The planet Mars is a treat for amateur astronomers, albeit a challenging subject, compared to Jupiter and Saturn.
Amateur Astronomy - Mars
Universal Sky Tour at Space.com has Mars facts, diagrams, and discussion about observing with telescopes.
Mars Doubles in Brightness is a good article by Science@NASA about the close approach with Mars late Oct 2005.
Orion Sky Times features tips for observing Mars, including a Mars map tailored for amateur astronomers, a Mars Physical Ephemeris Calculator to use with the map, and even a Yahoo Mars observer group.