Imagine this scenario... You just uploaded a new album to your drive and you are listening to it via the web interface.  Then you have some work to do in another folder, so you navigate around to where you need to be and you're doing your thing when suddenly, "Hey, I like this song a lot"!  I wonder what it's called?

Oops.  You'll have to head back to the original folder to find that out.

There's some really sweet, open Flash audio players out there that provide this very basic functionality.  Just a suggestion.