Ceres (Subscribe)
Links
Largest Asteroid May Be Mini Planet
http://hubblesite.org/newscenter/newsdesk/archive/releases/2005/27/text/
HubbleSite press release describes possible water ice and differentiation of material which may affect classification.
Astronomy Picture of the Day
http://apod.nasa.gov/apod/ap060821.html
Hubble Space Telescope picture of Ceres, with links to other resources.
1 Ceres - Wikipedia
http://en.wikipedia.org/wiki/1_Ceres
Article describes discovery, history and status, and physical and orbital characteristics.