There was quite some drama amongst WoW – Addon fans over the revised addon policies the past few days ! The most important one is that Blizz no longer wants people making money off their addons. Word has it, that carbonite’s Quest / Levelup addon was the main instigator for Blizzard to change this policy. I never tried it, but it had become adware, which Blizzard (and with all due respect that was expected to happen) didn’t want to allow.

Links:
New addon policy
Addon devs respond
Addons and rights – Tobold
Official forum thread