Our community uses an Internet Relay Chat (IRC) channel at irc.freenode.net#modeshape to discuss many topics, including new features, questions about how the software works (or doesn't work), work that needs to be done, and sometimes even comical banter.
If you have questions about ModeShape, checkout the user forum to see if that question was already discussed.
If your question is fairly involved, consider posting to the forum or asking on the mailing lists.
However, if you're not quite sure what to ask, if you'd rather have a discussion, or if you just want to get to know our community members, then IRC is probably the best place to do that. There are usually several developers on the channel at any time (there are community members spread around the world), any we'd be happy to talk with you.
There are quite a few IRC client applications, and everyone has their own preferences. But here are a few that we know people like: