Looking through many games on Steam, they aren't as good as 0 AD is. It would be cool to have it on Steam because more people would probably pay attention to it and probably get this game more views and more donations. Also there should be achievements once this game is fully out of beta and into release. Probably there would be a lot more people to help too if you put this on Steam as Early Access.
It's actually a pretty nice question to get, it means that people like the game and want others to find out about it and like it as well after all But sure, it would probably help a bit to include it on an FAQ page Since it would be a bit silly with a page with just one or two items I'll create a new thread where you (plural ) can help us come up with questions and finetune the answers