The page turner is a wonderful complex yet compact Rube Goldberg machine. The NYT has a bit of background on the creator behind it.
Antique contraception & protection from the disease - (NSFW) male & female methodologies of birth control from antiquity to the 1900s in pictures and text (Translated from Russian) [more inside]
Top 10 Food-Based Rube Goldberg Machines (videos) If this type of food preparation is too elaborate for your tastes, the Super-Fast Pancake-Sorting Flexpicker Robot might be more to your style.
Gizmo - using news footage from the 1920s to the 1950s, Howard Smith created an amusing 1977 documentary about contraptions made by the inventors, technophiles, and eccentrics of yesteryear. The last 7 minutes is Letterman interviewing Smith. (Google video, 1 hr., 19 min. Via beans beans good for your heart)
Incredible Machine 01 - clever Japanese Rube Goldberg type devices in action. Film clip, annoying soundtrack alert. (via digg)
Brent and Eivind's Couchbike Adventure. "In 2002, two intrepid cyclists rode a human powered couch through Maritime Canada." Via Gadling.
Survival System Train & Other Sculpture - "atomic-powered cyborgs, quasi-animate freight trains, and other absurd and fabulous contraptions populate the universe of Kenji Yanobe. Welcome to the world of the future-past, the unkempt aftermath of Better Living Through Science."