Geeky programmer or sysadmin types may (should) already be familiar with
stackoverflow.com and
serverfault.com, the Q&A sites. They may also be aware that the software has been adapted commercially (under the
stackexchange.com banner) for other target audiences,
mathoverflow.net and
moms4mom.com being two more notable examples.
It just came to my attention that there's a poker site:
outflopped.com. Not exactly heavily populated at the moment - kick-starting the community seems to be the big problem with such sites - but possibly worth a look. I seldom look at RGP these days - I wonder if it's been publicised there? The Q&A/voting thing seems to work well in general, once people get that they're not in a conversation/forum/argument framework; I wonder if that's an environment for poker players?