Today I received a notice that BIMWorld has released their BIMCONTENTManager 2008. It not only helps you organize your Revit families, but will also help those who are trying to manage AutoCAD blocks as well.
Take a look for yourself at - http://www.bimcontentmanager.com/ or take a look at the home page at - http://www.bimworld.com/ to see all the key features.
If you haven't been to BIMWorld, I highly suggest taking a look at what they have to offer. They provide content for almost all of the computer drafting/modeling software out there.