I like the idea. I've heard of programs like this within very-large companies (team X will send some devs to team Y to evangelize a new technology and visa vers

I like the idea. I've heard of programs like this within very-large companies (team X will send some devs to team Y to evangelize a new technology and visa versa), but I've never thought of it happening between companies. I think it's worth a shot. I think a lot of devs and companies might be uncomfortable with the idea at first, but that's what early-adopters/trailblazers are for (to show everyone the way, and prove that the concept works).