3 links
Cluster Balloon
clusterballoon.org
Describes solo flight in a harness attached to a cluster of helium-filled balloons.
Parabouncing - Balloon Jumping
parabounce.com
Using a 20 foot diameter helium balloon, simply push off from the ground and leap 100 feet into the air and travel up to a quarter-mile before gently returning to earth.
The Zebedee List
zebedeelist.co.uk
A comprehensive list of secondhand items for sale for balloonists.