The Nikon rebates in the US for this month are not as good as the curent promotions in the UK. Amazon offers up to $150 off when you purchase a qualifying Nikon digital camera (including Nikon 1, D3100 and D7000) and Nikkor lens (see the list of available lenses).
Update: The B&H version of the Nikon rebates is slightly different – they offer up to $300 off and also include the just released D3200 camera: