This post is inspired from a similar post on Jeremy Anglin's blog about statistics question and answer sites. I thought it would be a good idea to list some of the Operations Research and Analytics focused question and answer sites. Some of these
This site is a stackexchange Q&A Site started by Michael Trick. A crowd sourcing question and answer resource for anything Operations Research related. I believe the best one available for Operations Research.
Numerical Optimization Forum
I find it unfortunate that there is so little forums based on Operations Research. This is one of the few and it is a good one. It is moderated by IEOR Tools contributor Dmitrey.
I'm purposely leaving out the sci.ops-research Usenet group because I believe its fallen into disarray with spam content.
My favorite stack-exchange site dedicated to statistics.
StackOverflow - R tag
StackOverlow - SQL tag
Mailing lists do not get as much notoriety as they once did. Maybe because there are so many other options on the internet for getting information. I still think they are a valuable resource and a good online community.
R Help Mailing List http://www.r-project.org/mail.html
GLPK Mailing List http://lists.gnu.org/mailman/listinfo/help-glpk
COIN-OR Mailing List(s) http://list.coin-or.org/mailman/listinfo/
Beta StackExchange Sites
These sites might be of interesting to the Operations Research community. They are not live yet but are looking to generate a following.
http://area51.stackexchange.com/proposals/9218/operations-research (Interesting. Do they know about OR-Exchange?)
I would love to see more examples that I can include in this list.
I forgot to add O'Reilly's Q&A site with the R tag. http://answers.oreilly.com/tag/R