Wood & marbles adding machine: http://woodgears.ca/marbleadd/index.html

Teamviewer has my vote.

"The modern measure of accuracy is simply a matter of how many people believe and repeat a statement."

WHAT?!!!!!

This reminds me of a SNL skit from years ago. Some college professor ends up on family feud. They ask him a seris of questions everyone "knows" the popular answer to: eg. Who was the first European to discover America, popular answer Columbus, correct answer Leif Erikson. He keeps getting shot down because he gives the "wrong" (unpopular) answer.

Now we've gone from SNL farse to reality. Wow.