Those clever people over at Xbox.com, have added a way for those of us with Xbox Live, to add, remove, accept or decline friend invitations, all through the website.
This is yet another great addition for the Xbox 360 console and should make life a little easier, when managing our friends list.
this is a wicked feature because i remember you usually get those common people sending out friends requests as soon as u enter a lobby room. :-w
but what would be cool if they ever do this is if you could send a invite to a game via the website from the xbox 360. (when the 360 is turned off)