Also, I'd be wary of signing up with Facebook for a job-search app - while I'm not actually looking for a new job, if I were that'd put me off in case you posted a notification to my wall.
You are right about facebook! That's exactly why we choose to implemenent the mannual signup option without facebook. But we do respect the privacy of our users very much! We never post on any walls or something. In our the privacy settings you can furthermore control the visibility of every single field on your profile.
Also in response to your edit, I do trust that you guys are honest but I'm aware of a lot of sites which use Facebook Connect to get permissions to someone's wall and just start spamming them heavily. By emphasising Facebook Connect you may get tarred with the same brush.
I think most people would be ok using that for something career-oriented.
I've realized that password security is important, but instead of using any of the myriad password management tools out there I've decided to stop signing up for new things on the web. Please compensate for my lack of action. Also, i realize you have this easy Facebook signup thing, but Facebook is notoriously bad about privacy and apps frequently do things I don't want them to. As I've shown that I'm not an idiot by knowing that password security is important, it is not surprising to think that I, and other non-idiots, don't want to hook our facebook accounts to job hunting sites just to check them out. The consequences could be horrendous.
the point that I was trying to make which you seem to have completely misunderstood is that it doesn't seems necessary to create an account to use this application; I sign up for new things all the time but I don't think it's necessary for me in this case and feels like a barrier to entry. The OP asked for feedback, and I provided it based on my opinion on how I personally would use the service.
For the matching part you are absolutely right, it's not necessary to create an account for that. However, our overall goal is to connect talented people with matching companies and people with similar career paths. It's much easier to take advantage of this networking effect with active accounts. Maybe we can manage to let you create your profile at a later point of the path, I'll bring this to discussion tomorrow!