Wow, the spreadsheet that auto generates the game XML looks fantastic. This is pretty much the game I've always been waiting for as a modder. I can't wait to getmy hands on this stuff. I also can't wait to see what comes out of the modding community. There should be some wild stuff.
That said, I hope they wait as long as possible to release the modding stuff in beta. With Smart Exception automatically sending in crash reports, I can see what a nightmare it could be if there was a lot of mods being run. Plus, as much as I'd like to mod this game, I do NOT want to do it when everyting about the game is in this much flux. You'd just have to keep redoing your mods over and over and over. No thanks.
I hope Brad and company at least hold off until Beta 3 is looking solid and most of the stability issues have been dealt with and the core of the game is stable. Once they get to the tweak and polish stage, I think that's a much better time to turn loose the modders.