Developer communication tools
Let us know what you think on email, on the forum, or in-world. If it's not working for you, try to get help there. If it is working for you, try helping someone who isn't having as much luck as you are. File bugs - if you run into issues, look through the bug database and see if a bug has been filed. If so, vote for the issue to be fixed. If not, file the bug.
Mailing List
SLDev@lists.secondlife.com - mailing list for discussing the development of the Second Life viewer. This is a high-traffic mailing list (as many as 30-40 messages/day on a busy day). For a weekly summary of this mailing list, see SLDev Traffic.
Forum
If you are having issues getting things built, and you just want to ask a quick question, please ask it in one of the "Technical Talk" forums.
IRC
Internet Relay Chat - your instant way to communicate irc://irc.efnet.org/#opensl
Resident Run Groups
- Second Life Source Developers (Not a Official Group)
- OpenSL -- The OpenSL project at openmetaverse.org