WoW Addons to break

With the upcoming patch to version 2.0, it appears that most, if not all, Warcraft addons will stop working:

WoW 2.0 represents a major change in the UI code, and as such ALL AddOns will need to be updated before they will work, if for no other reason than the Lua 5.0 to Lua 5.1 changes. Some AddOns will be more seriously affected, and a few will have to be redesigned."

which really sucks. Some of the addon programmers will update their code once they know what the changes are, but some may just find it's not worth the agro.

If you rely on addons, whether it be for trading the AH or in raids be prepared for some major grief over the next couple of weeks.