With a public beta now available, many of us are wondering about when the final version of Windows 7 will hit the shops. Before that can happen, of course, Microsoft needs to decide on how many versions of the operating system it will produce, and what each one will contain.

Windows Vista is available in five key versions (Home Basic, Home Premium, Business, Enterprise and Ultimate), so it stands to reason that there'll be a few quite a few different copies of Windows 7, but what will you get with each one? We've picked a few likely candidates - but please add any versions you'd like to see in the comments.

Windows 7 Ultimate
Contains every single new feature Microsoft's engineers have come up with over the past three years, whether they're any good or not. Also the only version with "downgrade rights" to Windows 3.11 for Workgroups, and 2p from every sale goes into a legal fund used to fight against planning permission for new Apple stores.

Pro: With 2,014 versions of Solitaire, you'll never be bored again.  
Con: Except during installation, which requires six DVDs

Windows 7 Web 2.0 Edition
Will revolutionise the way you use your computer until, 18 months later, the startup funding runs out and it stops working.

Pro: Geeks will love the web interface (it's written in django!)
Con: Continually posts updates on your web surfing to Twitter.

Windows 7 Edition X
Completely redesigned interface, with the taskbar replaced by a suspiciously familiar-looking floating line of icons. Immune to most viruses, but entirely incompatible with other Windows software. Updates available for a fee.

Pro: It just works, apparently
Con: Drivers only provided for four specific models of Dell hardware that cost 20% more than usual. Running Edition X on any other computer is illegal.

Windows 7 Bargain Edition
Designed for the credit crunch, this version comes with a huge "CLOSING DOWN SALE EVERYTHING MUST GO" sticker on the box.

Pro: Cheaper than the Standard edition
Con: .. but only by 10p, as revealed in the small print. Also, icons appear slightly shop-soiled.

Windows 7 Basic
Includes clever search tools and a glossy new interface, but those upgrading from older systems might have problems with drivers.

Pro: Looks intriguingly familiar, and it's cheap
Con: Yes, it's just Vista again.

Windows 7 Netbook Edition
Optimised to run on low-power processors, and using a simplified desktop and file system to limit the graphics and memory overhead

Pro: It's Windows XP Professional..
Con: .. but resold at a higher price

Sadly Microsoft's real editions, whenever they finally get revealed, will probably lean towards the dull (Home, Office, Enterprise and so on). But what Windows edition would suit you, and what features would it include?