Inversed's CoreWar page included warrior rankings by iterative weighting and sequential push off, the results of the Tiny Stone Challenge, CoreOps, Randy and the 94nop warrior map.
Łukasza Grabuń has a series of Polish articles from Enter Magazine available, written by Andrzej Stasiewicz in the 1990s.
El Kauka has created the Corewar Web Comics.
FatalC claimed third place in CWSET 2005 and has been successful on a number of hills. Some of FatalC's code is published here.
Mizcu's page has an article about the development of one of his successful warriors, Monowire's Story - The tale of a beginners warrior.
Kevin Brunelle took part in Ilmari's Mini Tournament #2. [archived locally]
ICC 2006 - the cancelled summer 2006 meeting, which was to be held in Holland.
The FTP archives.