Come meet HackThisSite community members and staff at our assembly table, located near Chaos.Jetzt and WikiPaka WG in Hall 2 -- and check out our blinkenlights while you're there! You can also chat with us on our IRC channel at irc.hackthissite.org #36c3, or click here to join IRC by web. We will be competing again this year in the C3 CTF, so stop by our assembly table or join us on IRC if you'd like to join our team (regardless of whether you're at C3 or not).
If you aren't able to make it this year, you can always watch the talks live online (schedule here). If you are attending, make sure you read the wiki to get familiar with this year's C3.