I know we've got the fancy machine and all, but Karaoke Revolution is just so much more fun! Insted of just singing, you get points and can build up combos as you get more and more back to back phrases correct. Also, Karaoke Revolution 3 will be out in November, so we'll have at least 3 US versions, if not four, of songs to choose from.
Also, I got the Japanese Anime edition of Karaoke Revolution working. It's a more primative game than the US version, and the Lyrics are in Hiragana, but I have printed out lyric sheets in Romanji.
The great thing about it, is I was controlling the game and riding the level of the lead singer. When someone was dead on, I turned the lead singer all the way off; when someone else was having trouble finding where they should be singing, I turned the singer up for a bit to bring the person back in tune. In my opinion, that's how to do the other days of open Karaoke.