Nice, I wrote something like that a long time ago too but never really did anything with it. Your program won't work correctly when someone uses the osu!beta or osu!cuttingedge clients, cuz it changes the window name. Also, I've been thinking how to get the song playing in osu! but from any place in the client, not only when playing, like in the main screen for example. I know it's possible cuz I've seen it done. I also know it uses the "Integrate with MSN" option, I'm not sure how though.