Hey, I don't know if this has been posted or found before. I just found it today while looking for updated addons for WoW.
It's a program the you can run the will show you if your addon is out of date and it can update it for you, it also lets you download from over 1,400 other addons.
World of Warcraft AddOns & Mods :: WoW 2.4 Latest Downloads - WowMatrix is the website to download it from.
hope this helps someone :]