The official Windows Phone blog has posted a walkthrough of the new Games Hub
feature in the upcoming Mango release of Windows Phone 7
. As you can imagine, it borrows quite heavily from the popular features of the console Xbox Live, including a new "Recent" games browser, more ways to connect with Xbox Live friends right from the phone and new comparison views between accounts, similar to what's found on Xbox.com.
Additionally, Avatars are now fully 3D -- you can even shake your phone on the Avatar screen to make yours sick, and Avatars will "act out" certain emoticons that show up in messages from friends.
Mango is a free firmware update for all Windows Phone 7 users, and is slated to arrive sometime in this fall.