Kenrockwell.com is reporting that Nikon will be releasing the D60 around Christmas. Supposedly a 10mp sensor with fewer features than the D80. Retail for $599 and available in black or silver body.
Zach, you’re one the money with the Nikon lineup. The D3h would probably be the next in line.
Nikon never intoduced a straight D2 becauses of what they did with the D1 lineup, D1h for sports and journalists, D1x for commercial, editorial etc.