There’s a clever new map on ENWorld that takes all the RPG forums, and at one hex per 1000 users, turns them into a fantasy world map. It’s interesting to see the relative sizes. ENWorld, RPG.net, and WotC are all big, but there’s some big ones I’ve never heard of – what’s a “Myth Weavers?” And Giant In The Playground is a lot bigger than I thought. Anyway, it’s good fun, and might lead you to some fun new forums, so check it out!
Geek Speak
mxyzplk on Frog God Hero Lab Files screamindave on Frog God Hero Lab Files mxyzplk on Dungeon Crawl Classics –… Dieter Zimmerman on Dungeon Crawl Classics –… sopantooth on Dungeon Crawl Classics –… sopantooth on Dungeon Crawl Classics –… mxyzplk on Dungeon Crawl Classics –…
Geek Related 
Myth Weavers is a play by post focuses forum site. FYI.
I see a number of forums that I haven’t heard of before. Interesting. I no longer visit either WotC or EN World however. Once the shift to 4E took place I no longer felt welcome. One I do like is the 3.5 Private Sanctuary.