I used beta3 for these, performance was a bit better than with beta2.
I use an AMD Athlon x64 3400 2.21 ghz processor with winxp 64 w/ sp2.
Most of the games I could run on the 32bit version still work and with twice the performance. I couldn't get pokemon coliseum to run and got a humorous error when I tried running naruto 4 (error- not good, time to pray).
Zelda: TP is much more playable now (8-13 fps ingame) and maybe even more so on dual core (I don't have my dual core system set up

).
DBZ: B2 is much more playable (10-15 fps ingame), and super fast on loading and on all menus, even keeps around 30fps on the character selection screen when the 3d models are being displayed. Also, the sound is basically perfect.
Sound works on Shadow the Hedgehog, but I didn't hear any on the others.
I tested 5, only 3 worked (well I got a bit impatient on pokemon)