Yeah, I remember Nima, and I also remember a similar feeling upon discovering Beatmania. Now that I'm digging into the cobwebs of my memories, I am beginning to recall a game called O2Jam which was essentially a South Korean Beatmania flavored MMO. Very challenging, and it definitely usurped some of the space I was otherwise giving to Stepmania Online. Did you ever get into O2Jam? I think it might even still be around.