In theory it'd be easy to change the script to assume 23.976 fps instead of 25 fps and correct the vertical resolution for 16:9 NTSC. However, that picture that Laserman posted (here), showing how the X0 leaves the 925 standing in terms of quality, makes it pointless to do an NTSC version; there will be a better version available soon anyway. (I'd still like to investigate using a 2950 with a SweetSpot card, though, to see how that compares).
Yeah the screencaps look good - not flawless, but acceptable to my eyes - but that's no good if I can't get the audio sync spot on.