Erm. ICv2.com have updated their direct market sales estimates for January, but something smells fishy there. For some reason, everything seems to be about 5% higher than you'd expect, if you compare it to the December numbers, even in cases where there's no readily apparent reason for it.
Of course, it's not impossible that there's been a sudden major trend reversal in 2008, but it seems rather unlikely. In case some statistical error is involved - either on Diamond's part, which is where the raw data comes from, or on the part of ICv2.com's Milton Griepp - I'll hold off working on the new DC column for a few days.