That LoCreep app sounds horrible. Often the "creeps" are just socially awkward guys, and the last thing they need or deserve is public humiliation. Didn't we just go over this with the MTG champion?
Otherwise, this sounds like a great event.
I've used http://hackatopia.com/ before when I've been up to Chicago for hackathons. I like that Hacker League is more centered on each developer and the projects they've built.
I'd be interested to see if this can get any traction beyond the hackNY events.
The Hacker League guys are awesome. They pushed beta fixes to the system live as the hackathon was ongoing. The idea of saving/capturing these weekend hacks is a good one. The hackathon itself was a ton of fun. Here is a pic of me when I fell asleep coding at 4am. http://bit.ly/oVbyuf