I looked into doing an app in this area awhile back, and found that there is a ton of competition that do very similar things to your site.
As a way to stand out, perhaps consider doing more 'artistic' resumes - meaning ones that really jump out at you. Some quick googling results are below. There are a LOT of examples out there. It would require a lot more work to program/design, but since you're exporting to PDF and not Word, it should be doable and would be a big draw over the other online-resume sites.
It's a cool idea and I think you're on the right track, but the interface leaves a lot to be desired:
a) Most of this information is on LinkedIn, where's the integration?
b) Not everyone lives in the USA, why would you impose that on your users?
c) The edit resume interface is cludgy to the point of being unusable in Chrome.
[+] [-] JohnTitus|15 years ago|reply
http://bit.ly/gQrgQ6 http://bit.ly/9rmVYu http://bit.ly/hI5bFm
[+] [-] Aidan|15 years ago|reply
[+] [-] hortonew|15 years ago|reply
[+] [-] jerryblack|15 years ago|reply