Societies and Organisations

• Tucson Amateur Astronomy Association
• Flandrau Science Center

Vendors of astronomical equipment & software

• Earth Centred Universe Planetarium Software (supports Magellan I)
• SkyChart III Planetarium Software (supports Magellan I)
• Meade Instruments Corporation
• Celestron
• BC&F
• Lumicon
• Starlight Express CCD Cameras
• Santa Barbara Instruments Group
• Scope Stuff
• Software Bisque
• Images Plus
• CCDware
• Adobe
• David Hinds Ltd

Astronomy related publications

• Astronomy Now Magazine
• Sky & Telescope Magazine

Meade product forums

• Meade Advanced Products User Group (MAPUG): If you have a question or problem related to Meade equipment the chances are you can find the answer here
• MAPUG Topical Archives: answers to the FAQs on MAPUG in one easy to navigate site   

Astronomy related newsgroups

• sci.astro.amateur: very popular general astronomy forum
• sci.astro.ccd-imaging: specialises in CCD imaging questions
• uk.sci.astronomy: forum for UK astronomers
• Astronomy Archive: this site lists a large number of astronomy related forums and mailing lists

Websites of other amateur astronomers

• Doc G's Info Site: one of the best amateur websites
• Martin Bonadio's Astronomy Website (featuring the LX10)
• Philip Perkin's Astrocruise: some of the best amateur astrophotography you'll ever see
• Rob Gendler: The best amateur CCD imager 

Other astronomy related sites

• Hubble Telescope Pictures
• Digitised Sky Survey: display an image of just about any deep-sky object
• Model for calculating Magnetic Declination at a given Lattitude/Longitude