Blizzard dropped a bombshell on the addon community last Friday with their new addon policies (among a few other clarifications, addon developers can no longer charge for their addons or even ask for donations in-game), and developers are reeling. Already, the creator of the popular QuestHelper has responded on his changelog, saying that the addon is "dead." He says that he has tried to get donations without having an ingame link, it doesn't work, and that without any money coming in, he doesn't see any reason to keep the addon in development. Likewise, the developer of Outfitter has pulled his addon from the usual outlets, saying that he "will no longer add value to the World of Warcraft" and that Blizzard is trying to "continue a system of treating addon developers as if their time and products are worthless."
Blizzard may not be too worried about Outfitter -- they're planning to add an official Equipment Manager into the game soon (and Tobold makes a point that Blizzard may want addons to be worthless). As far as we've heard, there's no word from the folks behind Carbonite yet -- there's lots of speculation on their forum, but we've contacted them to try and get an official statement. They are the addon that's believed to have kicked this all off -- they were actually charging (and holding up full time jobs) for their addon, and word is going around that Blizzard released these new policies to put the kibosh on them.
We'll have to wait and see on the long term policies of these changes -- a few developers have already called for a strike, though who knows how successful an idea like that would be. We'll definitely see a few devs hold back from working on their addons, but it's unlikely changes like these will shut down the community completely.