Here are a few of my favorite sites, which you might also enjoy:

JBrushwork
Web site of my friend Jean Shen, a master painter who has also been my teacher in Chinese brush painting for the past few years.

World Heritage Tour
Quicktime panoramas of treasured artistic and historic places throughout the world.

"Toast"
A charming and hysterically funny performance of the "Toast" song by Heywood Banks, along with an entertaining animated flash cartoon.

Science Made Stupid
Excerpts from Tom Weller's hilarious spoof by that title (lamentably, now out of print.)

Minims
Another little book by Tom Weller.

Engrish
Comical misuse of the English language in other cultures.

Amanita Design
From the Czech Republic, delightful, absolutely charming Flash web games. I recommend starting with "Samarost".