5 links
Complete Review: Cryptonomicon
complete-review.com
General information, review of, and links to other reviews of "Cryptonomicon."
Problems with Bruce Schneier's Solitaire
ciphergoth.org
Describes some problems with the playing card encryption algorithm, includes an implementation in C.
The Solitaire Encryption Algorithm
counterpane.com
Explanation and source code for the crypto system used in Cryptonomicon.
Yamamoto and the Secret Admirers
electricinca.com
Introductory guide to both cryptography and the works of Neal Stephenson.