http://www.horizonsunlimited.com/hubb/
These guys really travel, slightly more hardcore than advrider.com, especially since there is alot more talk about not dieing or being kidnapped and stuff like that. Although a few years back when they were still based as a list server they did manage to raise enough money to pay the randsom of some guy who was held in central america.
Here are a few more stories along the lines of arond the world travel
http://www.horizonsunlimited.com/tstories/