Astrophotography sites
A Shot in the Dark by Kirk M. Rogers
Astrophotography by Jeff Ball
Astrophotography by Robert Gendler
Starry Nights Astrophography Page by Steve Walters, Steve has a great SCT Collimation procedure.
Astrophotography by Warren Keller
Astrophotography by Jerry Lodriguss
Astronomical & Nightscape Photography by Chris Cook

Equipment Review sites
Cloudy Nights Telescope Reviews
Astro-Product Reviews by Todd Gross
Scopereviews.com by Ed Ting
Ken's Eyepiece corner

Information sites
Astrophotography Mailing List (APML) Great resource for astrophotography information.
International Dark-Sky Association
New Mexico Skies
The Messier Catalog
Deep Sky Objects
Cherry Springs State Park "Stargazer's Paradise"
Photoshop for Astrophotographers