Quite some time ago I created a leaderboard on mygamercard.net for achievement and gamerscore buffs. It was set that I had to add everyone but it turns out I can set it so everyone can add themselves. So here is the open invite, if you have a gamertag, join the group here : http://www.mygamercard.net/clboard.php?id=iF9eS2fx
I figure this will also help out with adding people to your friends list as well, well at least I use it as such :P.