When I was looking through my Grounds Gold account a few weeks before the updates, on the "Portal Submissions" page, I already did notice a "46x46" little image and stuff. And I understood something was being planned, and that we could expect an update sooner or later hehe.
Anyways, I think that the update is just GREAT. I have already added a little avatar to all my movies. It really does add a whole lot more of fun and interactivity to the page. Each page is now kinda "unique" if you will. A really brilliant update guys !
Nice one !
Keep doing changes and making NG a better place ! :)