In CS6 we already have an option we didn't have before: We can view recently used fonts, and we can set how many to view. We also can choose to view them alphabetically or in the order of most recently used.
You can set these options in InDesign's Type preferences:
So, you want also to be able to designate a preferred font to stay at the top? That is not yet a feature in InDesign. If that's important to you, you could put in a feature request: