Atomic Zombie posted plans for their 12 foot “SkyWalker” tallbike.
From Atomic Zombie:
SkyWalker is a radical two wheeler that allows the bicycle hacking adrenaline junkie to surf the skies while at the same time amusing or confusing the slack-jawed onlookers below. Sure, tallbikes are nothing new, and have been around since the 1800′s, but SkyWalker takes things to new heights by allowing the rider to climb up and down the frame while the bike is in motion. What this means for tallbike pilots is that they no longer have to cling to a telephone pole to mount the bike, and worry about finding another pole when it comes time to dismount. SkyWalker is designed so that the pilot can control the bike from the ground, and all the way up to the top while climbing the built in ladder. Since the handlebars double as ladder handrails, the pilot is under complete control of the tallbike during the entire ascent.