I've got the first adventure about halfway statted up -- the problem is I keep having to come up with rules systems to put elements of it into (I mentioned undead, for instance). Even with the faster, more streamlined rules, it takes a while to create monster stat blocks out of whole cloth. I can pull some info out of the d20 SRD, and as the campaign goes on I'll have more stuff to build on from previous adventures, which will speed things up in time.
It's been a long time since I was this enthused about any RPG project, and I gotta say I'm loving it. :) It reminds me of the "glory days" of my Richmond Fantasy HERO campaign, and I'm hoping I can continue this momentum.