I've got a working 5.0 version of this addon running. It's still got a lot of work to do around cleaning up removed abilities, adding in new abilities, and cleaning up the requirements for specializations and talents.
However, I will continue to update the addon, because it continues to be a huge benefit to many raiders.
Please visit it's new project site at:
http://www.wowace.com/addons/cool-it
If the original author is still around please feel free to email me directly ...
Wish me luck on breathing some life back in to this great addon.