Cloverfield was #1 last week in both DVD sales and rentals, in the US and Canada.
The Cloverfield DVD pulled in $7.5 million in rentals, which is more than the last 10 weeks of the theatrical run combined. This was enough to edge out Juno, in its second week of release. This weeks big release is Golden Compass, which bombed in the theaters, so it's possible that Cloverfield will hang on to it's top spot this week.
I haven't been able to find any sales figures for the DVD yet, but RentTrak and the Canadian Press both report Cloverfield in the top spot. Cloverfield is currently #2 in iTunes sales.
Also interesting, Michael Giacchino's "Roar" made it in to the top 1o albums in iTunes (#10), but has already dropped down to #15.