This is a really cool initiative. I've been organizing Canada's largest student tech conference for a few years now, and one issue that comes up year after year is selecting engaging speakers (and how to be an engaging speaker is definitely a skill that can be learned). We end up skipping a lot of potentially interesting speakers because we either don't know, or can't be sure a few hundred university students will enjoy their talk(ing style).

The problem is definitely out there, and my best wishes to this project. You may also want to address the burden of proof for speaker qualification.