Here will include a list of some of the most successful and great sites I know of.
It's a little empty at the moment but I'll add non-Pivot related stuff later on.
DarkDemon.org - Probably the most successful Pivot forum around.
Droidz.org - One of the biggest stick sharing and Pivot sites by Jon, a fellow Elite.
WebShizzle.co.nr - This site is hilarious! Gray's awesome site has everything : D