I haven't had the chance to test this one out for myself yet but it looks pretty great. I think it's safe to say you shouldn't be running the auto-rooting app on your myTouch. From what I've read, that phone presents a different set of problems in terms of hacking. Progress is being made though. I don't have a G1 on hand right now, but when I do I'll post the results.
As always: I don't recommend doing anything remotely like this. IT CAN RUIN YOUR PHONE! That said, If this is a reliable method, what a time saver!