You may not know this if you just recently achieved Power User+ status on OiNK - you get access to a new forum called "Power User+". (Among other additional features)
Why do you care? Because there is a thread giving away Invites to other sites, and if you weren't so busy trading invites here on FST, you can request some invites for free there, by PMing people offering them. (Most are to level 2.5 sites though)
It's a sticky post too.