The Big Bad Baseball Annual is the successor to James' Baseball Abstracts.
The Baseball Prospectus is an innovative book with its neutral context statistics. It is an interesting read, and their website is excellent and frequently updated.
Mike Zaidlin's Thinking Baseball A frequently updated site that takes a look at the days baseball news from a sabermetric perspective.
Strikethree is a witty site that has several columnists who provide interesting commentary.
Baseball Stuff is Jim Furtado's site. It houses some excellent articles by many sabermetricians.
Sean Lahman's Baseball Archive is an excellent source for anything related to baseball.
Stathead an excellent site that contains many essays and Keith Woolner's Value Over Replacement Player (VORP)
John Skilton's Baseball Links an excellent source of many baseball links.
Netshrine is a look at the historical side of baseball, with excellent interviews, readermail, and more.
The Society For American Baseball Research is an excellent organization composed of great baseball fans. Everyone should join.
Retrosheet takes scoresheets from pre-1984 games and inputs them into the computer. The data can be used for a variety of analysis. They always need help translating and inputing the scoresheets.
