Are there any published Buffy d20M splatbooks, or pet projects, or something out there? A quick Amazon search didn't turn up anything.
One of the described settings in the core book and later supplements is essentially Buffy with the serial numbers filed off (Shadow Chasers?)
Was? I'd love to hear about your lackluster experience with the game, since everything else I have heard so far has been more or less positive. I'd like to hear both sides of the story.
I say "was" because, as many of these comments have suggested, d20M is badly in need of a second edition that updates the rules. WotC, though, has shown little interest in the idea. The lackluster and ineffective official supplements, particularly d20 Future, also didn't help. Thankfully, there are a ton of third-party supplements.
The concept behind d20M is great. The execution just needs some work. In particular, linking the core classes to the attributes was not a good idea. It would be much better to have a narrower list of four core classes built around clear roles. In my experience, char gen is difficult for many players because of the lack of clear roles for most of the core classes and due to the prerequisites for the advanced classes.
SW Saga is a step in the right direction, and I'd love to see a d20M 2d built along those lines.