After some searching, I found that Geekhack had an IRC channel on Freenode, but it's since become inactive and fell into disuse.
IRC's long been my preferred method of online communication, due to the immediacy and relatively candid discussions, the former likely having a lot to do with the latter.
I'm wondering if there's any interest in re-establishing it. I've taken the liberty of registering #geekhack on Freenode, and I'll set access flags for interested staff members.
Details:
#geekhack on irc.freenode.net
irc://irc.freenode.net/geekhackIf you lack an IRC client, try
XChat on Linux,
Colloquy on OS X, and
mIRC on Windows.
If you don't want to install a stand-alone client, you can connect via Mibbit, which is an Ajax browser-based IRC client.
This link will connect you to #geekhack within your browser.