Presenting for your laughing pleasure some humor-research web sites you might like to check out:

ART GLINER HUMOR CENTER (LARRY MINTZ):
http://www.humorcenter.umd.edu
 
ASSOCIATION FOR APPLIED AND THERAPEUTIC HUMOR (ALLEN KLEIN):
http://www.aath.org/
 
THE ASSOCIATION FOR THE STUDY OF PLAY (DON LYTLE):
http://www.csuchico.edu/phed/tasp/
 
BEETLE BAILEY (MORT WALKER):
http://www.mortwalker.com/
 
CALVIN AND HOBBES (BILL WATERSON)
http://www.ucomics.com/calvinandhobbes/
 
DILBERT (SCOTT ADAMS):
http://dilbert.com

THE FARSIDE (GARY LARSON):
http://www.thefarside.com
 
GARFIELD (CHARLES ADAMS)
http://www.garfield.com/
 
HARVARD LAMPOON
http://www.harvardlampoon.com/
 
THE HUMOR COLLECTION (RUTH HAMILTON):
www.thehumorcollection.org
 
HUMORWORKS (JOHN MORREALL):
http://www.humorworks.com
 
INTERNATIONAL SOCIETY FOR HUMOR STUDIES (WILLIBALD RUCH):
http://www.uni-duesseldorf.de/WWW/MathNat/Ruch/SecretaryPage.html
 
THE JOKE FACTORY:
http://www.webscope.co.uk/jokefactory/jokes.htm
 
LAUGHTER REMEDY (PAUL MCGHEE):
http://www.LaughterRemedy.com
 
LEGAL FUNNYMAIL:
http://www.funnymail.com/lawjcrim.html
 
MAD MAGAZINE
http://www2.warnerbros.com/web/madmagazine/home.jsp
 
THE MAD MARTIAN MUSEUM OF MODERN MADNESS:
http://www.madmartian.com
 
THE MOZILLA MUSEUM (TILMAN HAUSHERR):
http://www.snafu.de/~tilman/mozilla
 
NATIONAL LAMPOON
http://search.msn.com/results.aspx?srch=105&form=AS5&Q=national+lampoon
 
THE ONION (CAROL KOLB):
http://www.theonion.com
 
PARENTING HUMOR (TIM BETE):
http://www.TimBete.com
 
PEANUTS (CHARLES SCHULZ):
http://www.schulzmuseum.org/
 
POGO (WALT KELLY):
http://www.cartoon.org/kelly.htm
 
THE SIMPSONS (MATT GROENING):
http://www.thesimpsons.com/
 
WORLD LAUGHTER TOUR (STEVE WILSON):
http://www.worldlaughtertour.com/
 
THE WHOLE MIRTH CATALOGUE (ALLEN KLEIN):
http://www.allenklein.com
 
THE WHOLE WORLD TOILET PAPER MUSEUM (RICH TAGYERIT):
http://www.tagyerit.com/tp.htm
 
AMERICAN HUMOR STUDIES ASSOCIATION OF MLA:
http://www.newhaven.edu/UNH/Special/AHSA/AHSAHomePage.htm

ART GLINER CENTER FOR HUMOR STUDIES:
http://www.otal.umd.edu/amst/humorcenter/

CENTER FOR THE EASILY AMUSED:
http://www.amused.com

THE JOKE FACTORY:
http://www.webscope.co.uk/jokefactory/jokes.htm

INTERNATIONAL SOCIETY FOR HUMOR STUDIES:
http://www.uni-duesseldorf.de/WWW/MathNat/Ruch/SecretaryPage.html

LEGAL FUNNYMAIL:
http://www.funnymail.com/lawjcrim.html

THE MAD MARTIAN MUSEUM OF MODERN MADNESS:
http://www.madmartian.com

THE MOZILLA MUSEUM:
http://www.snafu.de/~tilman/mozilla

THE WHOLE WORLD TOILET PAPER MUSEUM:
http://www.tagyerit.com/tp.htm

Don L. F. Nilsen, Executive Secretary
International Society for Humor Studies
English Linguistics, Arizona State Univ.
Tempe, AZ 85287-0302

Great jokes don't just die... they end up on a joke site for you to laugh at.   

And here they are:

Will Hertz's Prank Letters

The Malaysian Comedy Club
Good Clean Humor

Freefunny.com

Click4aCure.net (Good joke site that donates to cancer research for each hit.)

The Clyde's Jokes

Archie Bonkers.com 

K.P.I.G. ("Wild Bill" and KPIG radio. Easy access to lotsa jokes)
http://www.flash.net/~netfit/index1.htm

http://www.jokesforall.co.uk/

Jax "Joke of the day"