I'm pretty sure that since he's switched to Pythagorean Win%, you can't predict score margins.
Since you're interested, I have my own computer rating system (I use the data Pomeroy provides on his site) that can be used for that purpose, with varying degrees of success. Here are the latest rankings:
Since NCAAT games are on "neutral" courts, just subtract one team's ranking from another's to find the predicted score margin.
Let me know what you think of these -- I'm looking for input.