This is mainly a foobar controller for me. I add songs to playlists, play them, then navigate through them later. I use arrow keys, would like to use page up/down, and type a letter to get to a folder.
I don't need wireless.. but I may have to consider it. Rechargeable would be OK, though. Tiny thumb-like keyboards won't work for me. The one Robin has looks pretty good to me. I saw those when I was looking last time but wasn't sure if the mouse-thing would work any better than my failing track ball. If my trackball would work reliably, I'd keep what I have.
-C