As for contacts and the address book: + http://code.google.com/apis/contacts/ http://code.google.com/apis/contacts/ + http://developer.yahoo.com/addressbook/ h

As for contacts and the address book: + http://code.google.com/apis/contacts/ http://code.google.com/apis/contacts/ + http://developer.yahoo.com/addressbook/ http://developer.yahoo.com/addressbook/ + http://msdn.microsoft.com/en-us/library/bb463989.aspx http://msdn.microsoft.com/en-us/library/bb463989.aspx Stop using the password anti-pattern (http://adactio.com/journal/1357 http://adactio.com/journal/1357) Facebook has a nice auth flow that http://www.billmonk.com http://www.billmonk.com uses. I'd suggest that. Oh, and hire a visual designer. A strong visual design goes a lot farther than any copy or lock icons ever will.