I'm not talking about articles written about startup ideas. I mean an active forum/portal designed for this purpose.
Ask your target market. I used to brush this same advice off each of the millionth times I read it, but do this at your own peril.
Nobody is going to give you better advice than your customers, especially if they speak with their money.
Is the market viable? Ask the market. Will customers pay for this service. Ask the damned customers!
As someone who has shy'd away from asking people in real life, I must say it's quite a revelation.
I was simply knocked over and gave up.
I'd be very much down for working on a project that developed a platform for discussing markets and startup ideas. I don't think its really ideas that make money so much as execution - but ideas are fun!
The possibility exists for it to be abstracted.