Some of my favourites links:

Doc G site : The  best site for undestanding deeply LX200 and others CCD products.

Supernova in NGC and IC galaxies Title is explicit

NGC Catalog Online

Messier Object Index

USNO Flagstaff Station

Starlight cameras

NStapper site  Deep deep deep objects !!

Observational Mishaps

Universia's:  Marc Sylvestre site . One of the best french ccd site and best images (english version here)

Audine ccd camera : France is not only country of bordeaux or burgundy whines, but also country of one of the world best "made it yourself" ccd camera. (english pages) : If you wont to rent for a week or more, one of the most beautiful house in Cassis, with private swimming pool, tennis etc...