I've just found a new job but got interviewed at two different places. However, I've just realized that I had a friend inside the company at both of those places.
They helped me to get inside (i.e. accelerating the process, talking of me in good term, etc.)
So:
1- For the one who actually work for a company: When you search searching your job, did you knew someone inside? Or what they you use?
2- If you own a company, how did your employees known about you?
I say that because when you're good, it's easy to find a job. However, it might not be easy to find your perfect job since you don't know about all the company.
And now, finally, for the startup idea:
A simple "friendsjob" where you log on with facebook, and you see job opportunities posted by your friend.
Does it already exist? Would someone be interested in creating that website? :)
Not sure if it exists but I work in IT recruitment and am curently toying with more inovative ideas for jobseekers online and to be honest, if this doesn't already exist then I will legitimately consider creating something similar.
The fact is, there are so many companies trying to avoid using external agencies for recruitment due to cost/economic climate that they are turning to employee referrals more than they ever have in the past so a user-friendly forum that offers a degree of discretion for people to post vacancies that have yet to be advertised is a great idea in my opinion.
I'll draft some ideas and let you know how I get on. You never know, there might be a job in it for you!