GreenTongue:
What does Gamers Plane have that here doesn't?
Well, at the time, games I wanted to play in that were recruiting. The few here that interested me, well, my RTJ didn't pass muster, or they were full by the time I submitted one. So I went looking elsewhere.
Mechanically, it's basically a forum-based Play by Post Site with a few additions. They have integrated a character sheet system, which I prefer to the text based character sheets typically used here, though that means a lack of customization. They have Dice and Card additions to forum posts that aren't code based. There's music integration, of a sort, though it doesn't seem to get much use. Finding/starting games based on System is integrated into it. It's a bit newer and has an active community.
I can't say it's better or worse. I like that the community is pretty active, dislike the forum based setup, like that they have clean and simple character sheets for most systems, dislike the lack of a thorough dice integration such as what RPOL has, though I'm glad it's not handled like most forum based dice rollers. RPOL is old, and sometimes that shows in a variety of ways, but it was also clearly developed with Play by Post integration in mind, and I've yet to find another site that has done so quite as thoroughly. GamersPlane was about as close as I could dig up.