Omega Project for Statistical Computing  
   Joint project to provide variety of open source software for 3 extant statistical languages: S, R, Lisp-Stat. Focus: new directions, more so web-based systems, Java and JVM, and distributed systems.
   http://www.omegahat.org/

Programming with Data: A Guide to the S Language  
   By John M. Chambers; Springer-Verlag, 1998, ISBN 0387985034. Premier reference work on S, written by its chief designer, describes new, greatly extended version.
   http://www.springeronline.com/sgw/cda/frontpage/0,11855,3-40109-22-2008951-0,00.html

Burns Statistics  
   Software, consulting, training, mainly for the fund management industry; working papers, tutorials, downloads, other information on quantitative finance and programming in S language (R and S-Plus).
   http://www.burns-stat.com/

Modern Applied Statistics with S  
   By William N. Venables, B.D. Ripley; Springer-Verlag, 2002, ISBN 0387954570. Guide to using S-Plus and R for statistical analyses: introduces using S, and is a course in modern statistical methods.
   http://www.stats.ox.ac.uk/pub/MASS4/

The Basics of S-Plus  
   Author's page with errata, prior editions, S links.
   http://www.elmo.ch/doc/splus-book/

S-News and S-News-Advisory Mailing Lists  
   Discussion group on S, S-Plus statistics, graphics, programming. Topics: programming, usage questions and suggestions; problem reports; new software announcements; books, articles; conferences, educational events; short job announcements.
   http://www.biostat.wustl.edu/s-news/

S Programming  
   Author's page with errata, description, contact information.
   http://www.stats.ox.ac.uk/pub/MASS3/Sprog/

ACM:Software System Award  
   Press release from The Association for Computing Machinery naming Dr. John M. Chambers of Bell Labs as recipient of 1998 Award for developing the S System.
   http://www.acm.org/announcements/ss99.html