Since I really don't need font management since I don't do any design work any more I can only pass on some information. I have tried Suitcase under OS X. It seems ok, a far cry better then the OS 9 native versions before, but it still doesn't do anything for me. I have heard that Font Reserve is a good font management application. Both can be run on servers to allow you to use the fonts from the server and not need to store them locally. That tends to get a touch expensive though, and really only for the business with more then a few people needing access to the fonts. The server part also helps if you have a huge number of fonts (many GB worth) and don't want to chew up the space on your hard drives with them.
My 3¢ worth
A