Appearing seemingly out of nowhere, zerokoubou has established himself as the new SF Alpha series master. In six volumes of combo videos, he's covered SFZ1, SFZ2, and SFZ2A. In his seventh video, he even managed to break new ground in Super Turbo.
zero koubou's homepage
zerokoubou Combo Videos Vol.1-6 (downloadable)
zerokoubou Combo Video Vol.1 | Vol.2 | Vol.3 | Vol.4 | Vol.5 | Vol.6 | Vol.7
Many of his SFA2 combos make use of a Custom Combo pop-up glitch which is explained in greater detail here. He also pulls off a few shady things in SFA1, most notably at 2:23 of his Vol.6 video, where two of Bison's normals seem to connect multiple times.