Wow all of this reminds me of my O2 jam days. I never became really good and the only rhythm-based game I mastered were the DJMax series for the PSP.
This is one of my favourite songs from O2 jam: http://www.youtube.com/watch?v=7cgzNFIoozA
I haven't played O2Jam but I recognize that song, it's by Beethoven, remixed several times, it's in Pump It Up as well.
Another good classical remix in Pump It Up - Pump Me Amadeus
Then there is this one ...
Edited by kiteki - 12/11/12 at 4:00am