• In Focus - I bought my telescope from them at Martin Mere
   
• Focal Point - where I got my Manfrotto head from.
   
• Eagle Eye OpticZooms - for the Digimount Adaptor

Birding Sites
Sites I have found useful

• Dee Estuary Birdwatching - describes the best Dee Estuary birdwatching areas with detailed maps and latest bird news for dedicated twitchers and casual birdwatchers alike.

Other Digibirders
I originally searched on Google for everything to do with Digiscoping and Digibirding, to research techniques etc. These are ones that I found most useful.

• Ann Cook's Birds of Manitoba - something to aspire to!
   
• Andy Holt's Digiscoped British Birds - the idea for the wallpapers
   
• Digiscoping.co.uk
   
• Andy Bright's Digiscoping UK Birds
   
• George Raiche's Digibird.com
   
• Stéphane Moniotte's Digiscoping & Digital Birding
   
• Yves Leduc's Souvenirs ailés / Feathered Memories - lots of tips on techniques.
   
• Laurence Poh's Digicoped Birds - apparently he started it all
   
• Jim Linch's Birdpix.com - contains forums and a gallery - Jim is also Ringmaster for the "Digiscoping Today" WebRing.