I would never encourage the use or rules of any GW model in anay game, save perhaps for the cheap plastics and rare nice hero. Though I must admit, their Spellcasting Elven Wizard guy is going to be a great D&D character.
Anyways, I would love to see what Thom cooks up for smaller company support. There are a few promising figure lines I'd like to see support for, as well as some generic stuff. Being able to design our own units would also be great, but I would not count on it.
Those Heresy models are very nice, though I admit, I have never ordered Heresy before (And am currently broke as hell, but Payday is soon, but then my spending cash is already spoken for)