Well, this is mostly a bugfix release, however it now has new frameskip code, which should be friendly with more games. It now also allows higher frameskip values, which should help games that run at high internal framerates. As an example, Tekken3 is much more playable with higher frameskip. Oh and there is now analog support, and an optimization for 4bpp sprites (Castlevania).
I haven't got a chance to try the Wiz version, so I don't know if it works (don't have it with me here).
Otherwise merry Christmas and enjoy the release!