Idea: Programmers book a time for me to call them up and hold a mock phone interview.
I'm using youcanbook.me to take bookings, and I will use skype or one of the cheap international providers to call people outside of the UK.
The interview will be 10-15 minutes. Just a taste of a programming interview, but enough that I can provide actual feedback, hopefully helpful.
Funding? I'm paying costs myself to see if the idea works. I'm going to give it a few weeks and then make a decision about what next.
http://cvmountain.com/2013/09/you-can-book-me-for-a-mock-phone-interview/
However, that does not mean you should give up on your idea. Just be sure you're basing your decision on popularity with paying customers.