The ESRB spills the beans yet again. The ratings board has listed Street Fighter Alpha II and III for release on the PS3 and PSP. So expect to see both games appear on the PSN Store at some point in the future. This might all be moot though, considering Street Fighter II HD is on its way "soon" and Street Fighter IV will be arriving next year. Honestly, how many different Street Fighter games do you need?
If all this news of imminent Street Fighter goodness has you itching to play, you can always grab Street Fighter Alpha from the US PSN Store right now.