you may also want to check out usenet. there are tons of really awesome newsgroups that deal with all manner of programming issues....in just about any environment. If you don't have direct NNTP support via your ISP, you can probably check out http://groups.google.com/
which gives you access to them via HTTP.
Plus there are probably a million great sites for C++ programmers out there, check out http://www.ddj.com/
. Also a google search on "C++" + user communities or something like that should yield good results.