Looks like it wont be on channel 98. Dish just updated their Twitter to say alert your HD friends and let them know the free preview will be on 386 instead.
FYI, the MGM preview channel has a bitrate of about 14.0Mbps while the normal version is at about 3.5Mbps on 61.5W. Makes it seem like this promo is a bit rigged.
Well, not quite. Yes, they insert commercials but as far as I can tell MGM doesn't censor the movies. Unlike AMC and UNIHD, they seem to be shown uncut and unedited.
I have watched a few movies on the channel. Some have been commercial free and the picture quality is excellent. One movie had 60 seconds or so of commercials for other MGM films showing that month. The movies appear to be uncut.
The movies they're showing ARE on the regular MGMHD now and then, they're not kicking it up w/different movies. The difference is they're editing the ones on the preview channel, like Thomas Crown Affair, but w/alot of the older ones it doesn't matter either way, anyway.