I've been quietly conspiring with a couple of friends to enter the 2011 Mongol Rally, a 10,000-mile, 6-week trek from London to the capital of Mongolia in an ill-suited 1-litre automobile.
We just sent off our visa applications for Kazakhstan, Kyrgyzstan, and Uzbekistan. Other visas needed: Azerbaijan, Russia, Turkmenistan. So, this is happening.
It's put on by The Adventurists out of the UK, and the basic idea is to invite trouble while raising money for charity. They put limits on the quality of car you can use, to guarantee you'll have to fix it on a bandit-infested mountain pass. The vehicles, such as they are at the end of the trip, are donated to the poor in Mongolia (where they can actually do a lot of good), along with at least 1k pounds per team in cash.
If this sounds like the best worst idea you've ever heard of, consider donating to the cause. And stay tuned, as I'll be updating on our progress leading up to the start of the trip.