Yeah, it must be pretty new. I just found out about it the other day. I just went through my User CP page and sent friend invited out to everyone who had saluted or gave me a high five, 3 times in the last 50 LOL.. In a way it reminds me of myspace except you cant arrange your friends list..
Wow, is this a new feature? Don't know how to use it, but anyway, sure you're all my friends.