Where are you sourcing the jobs from? This would be perfect if it aggregated jobs from all the other job sites. Searching for remote jobs (which I am interested in) in particular is a pain - and is actually why I signed up once I saw that was an option...
its a chicken and egg problem. i was recently looking for a job myself, in a small-ish city (200k people) in germany... and the job boards mentioned above were all completely useless. small companies in small cities don't post jobs in those job boards. its not worth it for them. posting a job at stackoverflow is something like 600 dollars.
i dont have an definite answer yet, all i know is, there must be a better way for finding jobs then google... right now i think i can offer this service, by just manually filling the system with high quality jobs matching all of my users critereas... someday i think this can be automated...