There will be a good-sized techie crowd there, in an informal networking environment. I'm sure you can make a better impression to potential co-founders through an interesting in-person conversation than you could through an online recruitment posting.

WebInno is another, slightly more formal (more dress shirts than t-shirts), event that's big on networking, happening this next Monday: http://www.webinnovatorsgroup.com/index.php

Hope to see you around.