I've been thinking about something similar. I've mocked this up:
me-vc.com
I'd be interested to hear what you think about it.
The idea is that it's micro-financing for start-ups. Anyone can invest small amounts in any start-up anywhere. There's more here:
Internet start-ups (for example) need less and less money to start. VC and Angel are not only less-and-less necessary, there's no reason we can't leverage the public (ala Wikipedia). I think the success micro-loans have made in less-priviledged countries can be duplicated with micro-equity here, and really, everywhere.
Again, I'd be very interested in what you think.