Lum the Mad has posted something very interesting regarding apparent new rules Blizzard is now imposing on mod makers. Comments to his posting thus far I think ignore the larger possible implications to mod makers which I summarized in my reply:
I personally do not believe Blizzard has a right to tell anyone what they can do outside of the game. But I also know that because of the Glider case that Blizzard has a big stick to pummel people with if they ever chose to use it again. At least until the case has been fully vetted through the appeals process.