Yesterday Apple released iTunes 10.5 in anticipation of today's launch of iOS5. Also launching today, iCloud.com - the cloudy part of the whole Apple ecosystem to keep everything synched.
Sign in easily enough with the same username and password I have for iTunes and all my media and app purchases.
Only thing active so far is Find My Phone. But there's a small bubble at the top informing me that mail, contacts, calendar and iWork is available after I upgrade to iOS5 or OS X Lion and an invitation to click the link for more information.
So I clicked it. Uh...
I suppose this will be fixed quickly enough, but it does show the importance of always testing, even the dumb little stuff.