The simple and clean design is actually what I like best about the site. I'm sure you've seen www.startuply.com (which is amazingly down right now because of an asp.net web.config error, wow!) That might be a good source of job leads for your crawler.

I also really like how you link to the companies website and not to some 3rd party job posting. Have you thought about adding more info to the start-up profile page on your site?