http://www.treehugger.com/files/2006/11/what_the_blimp.php

This cute little conveyance is nothing new. It once set a FAI
world record for it’s class of airship, flying 58 miles (93km). But that was 14
years ago. Now the White Dwarf is in the sky once more, thanks to the
determination of two enthusiasts, Reed Gleason and Bill Arras. They are on a
mission to develop small helium filled blimps, which use a combination of pedal
power and gas engines for propulsion. They’ve had the White Dwarf cruising up 15
mph (24kph), but are hopeful of arriving at a design that will manage 25 mph
(40kph) for at least two hours. Read about their adventures in getting the White
Dwarf airborne again, and where they want to go from here. ::White Dwarf, via
tip from Graham. (See also our previous post on the high flying hopes of
bringing airships back for commercial use.)