My other camera is a Nikon Coolpix 4300, which I've had for about a little over a year now. The Coolpix is still a great camera, and it goes everywhere with me, while the D70 is too big to fit in my backpack with my textbooks and laptop and calulators and stuff. The Coolpix 4300 also has a fantastic macro down to 1.5" minimum focusing distance.
I got the kit lens (Nikon 18-70mm 3.5-4.5G) which is an awesome lens. I am thinking of getting a Nikon 70-300mm zoom telephoto lens, which works out to about 105-450mm in 35mm equivalent focal length.
The low light performance is stellar, with ISO 1600 looking about as good as the ISO 200 on my Coolpix, and significantly better than ISO 400 on the Coolpix.
I ran across Sunny's photoblog in his slashdot signature recently. It's really cool. He's a guy in Hong Kong and he posts a picture every day to his blog, sometimes with one short sentence describing it. The photography is really fabulous. I think I'll start a photoblog.