Just seen an advert for the D3100 and D7000 in an ad break on Fox during American Idol.
Its not an advert I can recall from before - with the price rises for Nikon gear they must think its going to bring in enough business to justify the cost of placing the ad... or perhaps they are establishing the model numbers in consumers minds as they prepare the ground for new consumer space SLR models?
(this is a rumors forum after all....)