http://www.reddit.com/r/HackThisSite/
Since discussion in the forums is semi-stagnant and the site/forums themselves are a pain the arse to log in to, I created a subreddit as I personally use Reddit every day and it's much easier for me to check a subreddit than for me to come here. I encourage people to check it out and post interesting links, comments and of course QUESTIONS!
Go go go!