The D3000 has been replaced by the D3100, although the D3000 can still be found on the shelves at a significant discount. While there are savings to be had with the D3000, we wholeheartedly recommend the D3100 over this model, as the image quality is significantly improved and it offers video mode (1080p, no less). Here's what we had to say about the D3000 in mid 2010:
The Nikon D3000 is one of Nikon's entry-level dSLRs. It's meant to be a first dSLR for photographers who are looking to move forward with their photography. It's relatively light and small and easy to use, but the image quality is among the least impressive of any dSLR and its light on features. It's not a bad option for a first dSLR, but it's worth investigating other entry-level models like the Pentax K-x, Canon XS, or for a bit more money, the Nikon D3100, a newer, full-featured consumer dSLR that anybody looking at a D3000 should investigate.