This is worth being a resource it's so handy. If you're not a member of modcooperative already, you need to join now. Ever had a great idea for a game, but wanted someone else to run it? Ever wanted to run a game, but didn't have any ideas that weren't already done? Looking for a co-mod, but don't know where to start? How about wanting to pitch an idea and get some feedback before you proceed? Then you need to head over there stat.
And as a reminder, accessories is also great. I personally think of it as the misc. RP stuff advertising community although icon and layout makers are primarily meant to pimp there.
Also, I'm going to add some of the misc. RP-related communities to resources. If you have any suggestions (not icon makers although icon directories -- think pb_updates are cool), they would be much appreciated.