iOS 6, the latest generation of Apple's mobile software for iPod touch, iPhone and iPad, has finally been unveiled - and from what we've seen so far, it's going to delight an awful lot of iOS users.

From badly-kept secrets to things that have been on wishlists for what seems like forever, here are the highlights.

The iOS 6 release date is Autumn

iOS 6 was released as a beta today, but the final version will ship "this Fall".

iOS 6 introduces Passbook

Passbook is Apple's new e-tickets app, enabling you to carry electronic tickets for anything from sports events to plane travel, or to have a digital loyalty card. The tickets update too, so for example your airline ticket would send you a notification once your departure gate was announced or changed. Hopefully enough firms will support this one to make it work for all our everyday bits and bobs.

Update: It you fancy seeing PassBook in action on an iPod in Hong Kong airport, then you're in luck because the chaps over as PassK.it have given it a spin - shame the airport wasn't ready for it though! Check out the video below.

iOS 6 has an improved phone app

The revised phone app offers smart reminders, so for example you can reject a call with a message saying you're busy, on your way, lost in a forest... You can also be reminded to call someone back when you leave your current location. The new Do Not Disturb mode is particularly nifty: when new messages arrive, they do so silently and without the screen lighting up. If you wish, you can also tell your iPhone not to silence calls from a list of favourite callers, or to automatically silent repeat calls from the same person.

iOS 6 has Facetime over 3G

To tell the truth, we're amazed it took so long. If this takes off, the mobile operators will be very sad. Unless we use it abroad, in which case they'll be dancing on great big piles of our money.

iOS 6 has a brand new Safari app

There are lots of useful improvements here: Instapaper-style offline reading, iCloud tab syncing and photo sharing website integration to make uploading less hassle. Less wonderfully, Smart App Banners enable websites to tell you about their sodding iOS apps more easily, which is just brilliant. Who among us hasn't thought, "man! I wish more websites told me about their iOS app on each visit!"?

iOS 6 Mail has VIPs and pull to refresh

Pull to refresh is here! Yay! You can also create a list of VIPs whose messages will appear on your device's lock screen and in a dedicated, separate mailbox. Sharing photos or videos from within Mail is finally here too, as are per-account signatures.

iOS 6 photo sharing is more selective

Instead of sharing everything with everyone, you can choose which photos should be shared with which people. We're not sure why you'd use this rather than, say, put a friends-only album on Facebook or Flickr. Anyone?

So how do the new iOS 6 features stand up against Android 4.0 Ice Cream Sandwich? We compare maps, browsers and voice assistants:

iOS 6 makes Siri more serious, and puts it in cars

Siri is able to understand a wider range of questions than before - the demo showed it understanding questions about sports scores, statistics and trivia, booking restaurants and finding out what's worth seeing at the cinema - but as yet it's unclear which, if any, of these features will make it to the UK. Local search is being rolled out worldwide, however, and there's support for more languages.

Siri is also going mobile: the new Eyes Free feature will put a Siri button on the steering wheel of Jaguars, Land Robers, BMWs, Mercs, Toyotas, Chryslers, Hondas, Audis and GM cars. The manufacturers have promised to support the feature in the next 12 months.

iOS 6 brings Siri to the iPad

...but only the new iPad.

iOS 6 has Facebook integration

Apple promises "the best Facebook integration ever in a mobile device", and to our eyes it looks pretty much the same as iOS 5's Twitter integration: you can post photos, locations, URLs and so on to annoy your friends. The API is public, so non-Apple apps can share to Facebook too, and you'll be able to see your Facebook friends' App Store recommendations.

iOS 6 has guided access for children

The new Guided Access feature enables you to disable certain parts of the screen so that children can't accidentally hit the wrong buttons. We're going to use it on the in-app purchase icons in every kid-targeted iOS game. Hahah!

iOS 6 has a new Maps app

New York, London, Paris, Munich, everybody's talking about - iOS 6 maps! Well, maybe not, but Apple's much-rumoured mapping system finally breaks cover. It's pretty, will have traffic information, doubles as a sat-nav system with turn-by-turn navigation, can be controlled via Siri and will probably be rubbish outside major metropolitan areas in the UK. Still, the new Flyover 3D views of major cities are lovely.

Update: It's been confirmed that Yelp, a social networking, user review, and local search service, will be integrated into Apple's new mapping software - allowing you to check out restaurants, bars, clubs and cultural venues.

Update:Google is clearly concerned about loosing a huge percentage of the mapping market, as it's slashed the price of its Maps API by 88 percent following Apple's announcement of its own service.

iOS 6 dedicated Podcast app

A report from AllThingsD suggest that Apple may be about to give Podcasts their own application within the forthcoming iOS 6 software.

iOS 6 should be adopted very quickly

Unlike other mobile operating systems, iOS isn't dependent on mobile operators approving updates: as a result 80% of Apple's 365 million iOS customers are using the latest iOS, compared to 7% of Android users. Once iOS ships, expect a similarly speedy take-up.

iOS 6 doesn't work on everything

iOS 6 supports iPhones from the 3GS onwards, the fourth generation iPod touch and the second and third generation iPad. Check our story for more on iOS 6 compatibility.

Update: Apple has now pushed out iOS 6 Beta 2 to developers, available on the iPhone 4S, iPhone 4 and new iPad. Why is this exciting? Because the cogs in the settings icon now spin... oh yes!

Update: Version iOS 6 Beta 3 has now been released by Apple, sporting a variety of bug fixes, improved keyboard and navigation editing capabilities.

Update: However developers have already managed to Jailbreak iOS 6 beta 2, so if you're someone who likes tinkering with handsets you might me able to get it running on the earlier iPhones and iPads.