I've taken photos of my EU 998, Rabies Certificate, FAVN results (from the Kansas lab), the actual checklist used by the pet folks at Manchester Airport, and accompanying letter from my vet to cover my bases. Hopefully folks can use these to know a) what they need and b) how they need to be completed. You do not need a Facebook account to view these photos; if you would like a high res version please feel free to PM me.
Completed EU 998:
Side 1: http://www.facebook.com/photo.php?pid=2183710&l=6174512cbf&id=718071485
Side 2: http://www.facebook.com/photo.php?pid=2183711&l=9fcf38d53b&id=718071485
Kansas Lab Rabies Antibody form - original!
http://www.facebook.com/photo.php?pid=2183712&l=b2ae8d29b4&id=718071485
Rabies vaccination certificate (with microchip number)
http://www.facebook.com/photo.php?pid=2183713&l=9749eb940c&id=718071485
Letter from vet validating that cat was chipped, then vaccinated (as a CYA measure)
http://www.facebook.com/photo.php?pid=2183714&l=56557449b3&id=718071485
UK/EU Customs Declaration form (puts a monetary value on your pets for declaration purposes)
Page 1
http://www.facebook.com/photo.php?pid=2183878&l=81b09904aa&id=718071485
Page 2
http://www.facebook.com/photo.php?pid=2183879&l=9ebe325870&id=718071485
Manchester airport "Pets on Jets" checklist used to clear Eliza into the UK
http://www.facebook.com/photo.php?pid=2183715&l=5d40808264&id=718071485
The only form I can't find is my APHIS 7001, which I think was kept by Continental Airlines because they required it. If I find a copy I'll add it to this post.
And, to make life super-easy for folks, here's a link to the EU 998 form that you can print (one sheet, two sides!) for your own PETS proces
http://ec.europa.eu/food/animal/liveanimals/pets/sanco10767r4_en.doc