Introducing the Google Contacts Data API. Brilliant! (and about time)—now there’s no excuse for asking your users for their Gmail username and password so you can import contacts from their address book. Yahoo! and Microsoft need to catch up on this one fast.
It looks like it is. Any idea when that was released?
Microsoft released the Live Contacts APIs last week (28-Feb-2008) along with a whole range of other enhancements to the Windows Live Platform.
http://dev.live.com/blogs/devlive/archive/2008/02/ 27/213.aspx
Nice to see Google catching up ;-)