Apple's finally done something pretty awesome with their iCloud domain — this evening the iCloud.com website has gone live giving developers access to their mail, contacts, calendars, and iWork documents through the web. Developers testing iCloud's features can log in and play around with a gorgeous interface that mimicks a lot of iOS interface elements. For example, if you type in the wrong password at the login, you'll get iOS-style dialog boxes in the browser. It's cool stuff!
Pricing has gone live too, and according to 9to5Mac, iCloud will offer 10 GB, 20 GB, or 50 GB of additional storage (it adds to your 5 GB) at $20.00, $40.00, and $100.00 a year respectively.
Update: Apple.com has updated their pricing on their What is iCloud webpage, under the Free gets you a lot section. Click the blue storage upgrade link for the popover.
For the web geeks out there, @SteveStreza on Twitter takes a shot at the technologies behind the iCloud website.