Random House UK
Publishers of the UK edition of Against the Day
(and, unlike Penguin, they give it a special page...)

Pynchon entry in the Wikipedia
Great and thorough overview of Pynchon — an excellent resource.

Pynchon Blog
"It's Pynchon's world, we just live in it..."

Thomas Pynchon - Man of Mystery
A lovely comic about TRP.

Pynchon Notes
Home to the scholarly journal edited by those two masters of Pynchonalia, John M. Krafft and Bernard Duyfhuizen.

A Companion's Companion: Illustrated Additions and Corrections to Steven Weisenburger's A Gravity's Rainbow Companion
Great work! Prof. Larsson improves on the guide to Weissenburger's perpetually book-bound guide to Gravity's Rainbow.

"Babies of Wackiness: A Reader's Guide to Vineland"
Built by John Diebold and Michael Goodwin, this site explores Pynchon's fourth novel in a format similar to Weisenburger's guide to Gravity's Rainbow

Spermatikos Logos
Established by Dr. Larry Daw in collaboration with the Great Quail – interesting content, great graphics and useful links.

Pynchon List Server Archive
W.A.S.T.E.'s searchable repository of discussions on the Pynchon List, which in the past have included a blow-by-blow group-reads of Gravity's Rainbow, Mason & Dixon and Vineland.

Pynchon News Service
Mysterious...

The Pynchon List
Serious? You may want to consider joining this "list-serve" online group of sometimes fractious, always interesting folks.

Thomas Pynchon Home Page
Full of interesting and useful Pynchonalia.

Dr. Daw's Illustrated Gravity's Rainbow
Masterful & gorgeous visual interpretations of all the chapters...whew!

Drainage & Pynchon...
Come explore the nether world, the chthonic realm of Drainage!! "The state of a civilization may be inferred from the state of its plumbing."

Paper Pynchon ... oh yes!

Electronic Book Review
Promoting print/screen transformations and weaving new modes of critical writing into the web...

Otto Sell's Pynchon Pages
A German website about Pynchon, part in English, part in German, with many useful links.

Smoking Dope with Thomas Pynchon
This is a story about the sixties: it's about Andrew Gordon and some friends of his, it's about Berkeley, and it's about Pynchon.

Cashiered!
Selected texts from the works of Thomas Pynchon.