You should get the Windows version of Puyo Fever (if you're running XP, the Japanese interface isn't even an issue). You can play against other people in Random Matches and it seems like fun, especially with the USB controller. Too bad it's random and you play a 6th Kyuu guy one round, and a 4th Dan guy the next. Many of the dans only seem to play Arle too... you get to see some amazing Puyo 2 strategies in play sometimes. But it's still cool to play them online.
I think the Dreamcast one was 4 player and it wasn't too bad... we'll see if my friend Richard buys this and get his input.

(He'll probably borrow my DS to add it to his guide...)
He owns more versions of Puyo 2 and Puyo Fever than anyone else in the states. When his grandfather was still alive and they used to visit him in Hiroshima, he used to go to the Compile store there and buy a bunch of Carbuncle and other stuff.
Before Compile went *poof!*, they sold all their remaining stuff to... AIKY? something like that... Compile did one new Arcade puzzle game, similar to puzzle fighter IMO (but any piece dropping could be turned into a crash gem), then they went under. Bandai and the company JUST released it for PS2. That was his most recent purchase. Before that it was either the Sega Ages release of Puyo 2 or the PC version of Puyo Fever.
(He also has the Dreamcast and PS2 versions of Puyo Fever and borrowed my cube for the US Gamecube release of Puyo Fever to add data to his FAQ. Found the game for $15 for him (walmart.com), but don't know if he bought it or not.)
Here's all his Puyo guides:
http://ruyeyama.best.vwh.net/puyopuyo/dwwsdwn.html