A few listees have asked me to give a summary of the information that I received about cameras and bird photography. 
Thanks to all who replied to me on this subject. You are all wonderful!
 
Here is what I have (if anyone has anything to add, feel free!)
 
Cameras:
 
Most recommended:
Canon Digital Rebel XTi Digital SLR (10.1 megapixel ~$650)
     (there are several models with varying resolutions etc.)
 
Also recommended:
Nikon D-series
Nikon Coolpix
 
Lenses:
 
Most recommended:
Canon 100-400mm f/4.5-5.6 with Image Stabilizer (~$1500) - ~3 lbs
Canon 400mm f/5.6  (~$1100) ~2 lbs
 
Also recommended:
Tameron 300mm f2.8 telephoto (~$4000)
Nikon 80-400 mm f4.5-f5.6 ED VR AF zoom (~$1500)
 
Not highly recommended:
Sigma lenses (some had issues with these)
 
Other Tips:
 

  a.. Take lots of photos of every subject. Luck is a huge factor in great photos!
  b.. Use the RAW camera setting to get the best quality.
  c.. Increase ISO speed when possible
  d.. With a long lens: When possible, use a tripod, but a lens with Image Stabilizer will help in hand-held photos
  e.. Use a good photo editing software (i.e., Photoshop) to crop and enhance the photos.
  f.. Megapixels are your friend! Especially when taking photos of distant birds. 
Be careful purchasing online unless it's B&H photo, Adorama, or 17th Street Photo (all in New York City). 
These stores have passed the test of time and their reputations are solid. 
The others are grey market, bait and switch and otherwise a real gamble. 
 
Experience with Amazon.com has been all good.

Photo Field Trip at MOS Conference: Doug Bolt and Monroe Harden are leading a photography field trip to Harford Glen on Sunday. 
You can learn tips and tricks for getting better bird photos, plus you can see a variety of camera equipment in use, and get lots of first hand opinions.