I'm going to link in this thread to many of the best Robotech sites I've encountered on the Web. I'll add more as I come across them, either surfing or finally going back through my bookmarks.
Fansites
The Robotech Reporter- the best and most current source for Robotech news.
The Robotech Reference Guide- one of the premier sources of Robotech information, created by a group of people who later went on to work on the Infopedia at Robotech.com. Be warned, however- a significant amount of the information is speculative and/or unofficial, so be careful in what you believe (this especially applies to references to any events after New Generation). However, the site is very enjoyable read (in my opinion).
Robotech Comic Universe- though it has not been updated in a long time, this site is one of the most complete resources available regarding the various Robotech comic series that have been released over the years
Official Websites
The Official Robotech Website
The Official Robotech: Invasion Website
The Official Robotech: The Shadow Chronicles Website
The Official Robotech: Prelude To The Shadow Chronicles Website
Genesis Climber Mospeada
The Ultimate Genesis Climber MOSPEADA Homepage
The Genesis Climber MOSPEADA Universe
Super Dimension Cavalry Southern Cross
The Super Dimension Cavalry Southern Cross Universe
