I really like Linkedin for a simple reason of showing me which big companies operate and are hiring in my city/country. I would never have guessed that some companies operate over here (e.g. Oracle).

I then also really like one local website that shows which startups are hiring. The tone of the ads is very different, and there are no huge companies like Oracle or HP, but a ton of companies I don't even know existed.

What I think are gimmicks that won't work:

- asking candidates for tech skills and matching them with skill requirements of a job ad (been done a million times, never works for anything more than superficial word matching)

- trying to pre-screen candidates so that you can boast great quality of job applicants (I'll simply browse your companies and apply directly to them, not bothering with your system. If I can't see the companies, I'll pass. I'm not desperate to waste time on your skill checks)

- Not showing names of the 'amazing companies' who put the ads on your site (been done a few times, a useless gimmick, I'd never respond to an unknown company unless I were desperate for a job).

What I would love:

- Set up a "follow a company" watcher so that it gives me a breakdown of "these are the job positions opened/closed within the last $time_period", "they started hiring X% more of $position", etc. Simply data about company, or even a city. I would pay for that feature, provided the site was large enough to have meaningful statistics.