As always, this is being constantly updated...

Johnny Ganja Seed
Two really funny flash movies, definitely worth watching.
Metafilter
Community Weblog
Camp Chaos
Some funny flash cartoons, some crap ones aswell though.
Cat-Scan.com
Obviously people get their kicks from scanning their cats. This guy gets shitloads of hatemail.
Rotten.com
Classic site, if you haven't been there the name says it all.
Yahooka
Cannabis related directory & search engine
Karma Sooty
Too much time on his hands (check out 'naked!')...
MC Hawking
He's laying it down
3D Porn
Need the bloody glasses though!
The Onion
Classic funnyness
Hairy Tongue
More funny shit.
TV Go Home
Classic pisstakers
Modern Humourist
Subtle (american) comedy
The Christian Wrestling Federation
Need I say more..
Repent NOW
Go there for your sake