2. Tons of frequent flyer stuff is out there now. The best data is:
3. You can link live to United, American and other FF progs. There's even an
4. Some of the airline sites are staggeringly good. United's is very
thorough. British Airways has some great interactive brochures. There's even
QuickTimeVR of the new First Class and so on.
5. I discovered some great pages from the early beta of the United site. See
if your jaw drops as far as mine did on the secret PassPlus program:
PS. all the other sites here are available one link away from those cited.