Worth a look...

[The Sprouting Divot]

This is work safe, although I think you're likely to run a pretty serious risk of not being able to contain your laughter. I almost choked to death on miscellaneous phlegm that I knocked loose while laughing.
http://www.candyboots.com/wwcards.html

This is more or less work safe, but it's best viewed with sound, and it has plenty of cartoony violence. Nothing pr0n related or anything, just good old fashioned violence.
http://www.jonmega.com/albums/album32/sheriff.swf

[whatsthatsmell]

This made me laugh...