Jitter, Cycling74’s amazing, visually-based, object-oriented, interactive video modular for Max/MSP now has a Windows (XP) Public Beta! Note that you will need Max/MSP to get it to work (not sure if you need a v-dig, or the like, as you do with TTC-Pro MX for Windows), but it will work with demo versions. Also note that the Mac platform still kicks Windows’ ass.