While I'm not into using last.fm and sharing with the world, I do like having my own server keep track of what is listened to the most and who is playing what.
Right now, the server shows the Android player as listening to whatever it happens to be "downloading" at the moment, which makes sense because it is using the "Stream" function, so the file is transcoded.
I would love it if there was a way instead for the Android player to tell the server what it was actually listening to, both so the status was correct, and so when I download something and listen to it every day for a week, it registers as 7 listens and not just 1.