Thanks to everyone who responded to me on the AES archive. Most people pointed me to the counterpane.com web site, which is very nice and well done, and answers most of my questions. Unfortunately, though, Counterpane itself is one of the candidates, so the site may not exactly be unbiased. Is there any site with a similar scope being run by a disinterested party?

Apparently you did not see the post which directed you to http://www.nist.gov/aes/. This is the home page for the AES. It has links to independent analyses of the algorithms, as well as performance information. From that page we find: Block Cipher Lounge http://www.ii.uib.no/~larsr/aes.html cAESar Project http://www.dice.ucl.ac.be/crypto/CAESAR/caesar.html Efficiency Testing Table http://home.cyber.ee/helger/aes Efficiency Testing Results http://www.seven77.demon.co.uk/aes.htm Analysis from Louis Granboulan http://www.dmi.ens.fr/~granboul/recherche/AES.html NIST's preliminary efficiency testing results http://csrc.nist.gov/encryption/aes/round1/nistefficiency1.pdf