I actually think an idea dump thread would be a cool idea. Just because one of us might have an idea that we won't work on doesn't mean that it's not the perfect idea for someone else to run with.
In other words if you don't start an idea dump thread I will. But it was your idea first.
There is basically a whole forum subsection devoted to this on the INSIDE:
Ideas Needing Execution (INE)... Multiple threads of Fastlane business ideas.