I'd suggest you and your team go to a bunch of Startup Weekend/Hackathon events. When I've gone I've found a lot of cool people come to those who have the other side of your problem, good idea but no tech/bizdev/capital. It's also a great test to see if 54 hours of dedicated work on the problem yields something that is interesting... if yes great... if not you may be on the wrong path? (Note: there are some important rules about IP at these events you should research/understand fully).

I'd also change your thinking/language from looking for an "idea" to looking for a problem. The distinction may seem slight but it is important + helpful. The idea is really the solution, which often isn't clear until after a lot of sustained thinking/experimenting around the problem.

I'd try to find problems that genuinely personally piss you off. Building a company always takes longer and is harder than anticipated... so you have to be completely committed.

Finally, sell it in person right away... like day 1. Go sell it to people you don't know for real money even if it's not ready yet. When you go around asking people for money you'll either get it or get a lot of really brutal feedback on why not. Either outcome is helpful at this stage.

Good luck!