Much as voiced by Newt at Sorcerer Under Mountain, I never felt it was appropriate for my players to have any remote chance of actually defeating a god or demi-god in battle. I understand that's kind of the point behind James' idea, and that he tailored it specifically toward petty gods just because of that. I don't have a problem with that at all, and agree that it sounds like a good bit of fun for a high level party in the right situation. The thing is, I'm still left with my own total incompetence at applying stats to deities.
My solution is to post up some of my ideas here, with no stats. I posted some of what I'll be putting up here over the next few days over in Scott's PbP forum. Over there, I offered that others could stat these up and send them to James, and I'll say the same here. Here's the first one below.
Temulac, God of Baking:
Propitiated to ensure the successful completion of pastries, bread, pies and other baked goods. Easily enraged by throwing out leftovers or extras. Appears most commonly as a bulbous naked man covered entirely in flour, with a baker's hat. Those deemed particularly evil in their wastefulness may find themselves turned into some type of small anthropomorphic baked good, remaining sentient but immobile and unable to communicate.