Rick Miller

I found this comedy act which is not a classic stand-up, but is really funny to hear the Queen song "Bohemian Rhapsody" in 25 annoying voices.

25 Different Voices

25 Different Voices - The most popular videos are here

Queen - Bohemian Rhapsody (the original song)

Robin Williams

I watched on Youtube probably the best one-man show ever did by Robin Williams on Broadway. I'm used with at the most 30 minutes stand up comedy acts, but this one has 2 hours of pure humorous lines.

UPDATE: The guys from youtube have removed my original posted videos, nut I find back some parts from Robin Williams' Broadway show.

A Hot Day In New York

Golf and the guys who invented it: the scotsmen

The French and their atomic bomb

Jamaican Atomic Bong

Jihad

Moses

Jesus, Mother Teresa, and Gandhi

Death Penalty and The Execution

International Sports

Winter Sports

Fukitol (prescription drugs and animals at the zoo)

Viagra

The Best End