Baseball organisations:

Major League Baseball
Minor League Baseball
NCAA College Baseball
USA Baseball
Little League Baseball

International Baseball Federation

Liga Mexicana de Beisbol : translation
Professional Baseball Organisation of Japan
Australian Baseball Federation

The US media:
ESPN
CBS Sportsline
Sporting News
CNN Sports Illustrated
Fox Sports
SportsNetwork.com
Baseball America

World media:
BBC Online US Sports
Mexican baseball at ESPN : translation
Cuba Granma : translation
Japan Times
Japan Today

Stats:
baseball-reference.com
MLB Historical
Current MLB season (ESPN)


MLB teams in the papers:
Angels/Dodgers: Los Angeles Times
Astros: Houston Chronicle
Athletics: Oakland Tribune
Blue Jays: Toronto Star : Toronto Sun
Braves: Atlanta Journal-Constitution
Brewers: Milwaukee Journal-Sentinel
Cardinals: St Louis Post-Despatch
Cubs/White Sox: Chicago Tribune
Devil Rays: Tampa Tribune
Diamondbacks: Arizona Republic
Expos: La Presse : translation
Giants: San Francisco Chronicle
Indians: Cleveland Plain Dealer
Mariners: Seattle Times
Marlins: Miami Herald
Mets/Yankees: New York Times : NY Post
Orioles: Washington Post : Baltimore Sun
Padres: San Diego Union-Tribune
Phillies: Philadelphia Inquirer
Pirates: Pittsburgh Post-Gazette
Rangers: Dallas Morning News
Red Sox: Boston Globe
Reds: Cincinnati Enquirer
Rockies: Rocky Mountain News : Denver Post
Royals: Kansas City Star
Tigers: Detroit Free Press : Detroit News
Twins: Minnesota Star-Tribune

FansOnly college baseball

On television in Australia in the next 7 days:
ESPN Pacific Rim : Fox Sports

History
National Baseball Hall of Fame, Cooperstown
Negro League Baseball Museum
negroleaguebaseball.com
blackbaseball.com
Australian Baseball History by Joe Clark

The 2000 Sydney Olympics baseball tournament:
Sydney Morning Herald

Baseball links at the Open Directory Project