There was a thread a while back about Long Way Round (Ewan McGregor and Charlie Broomeran's motorcycle trip from London heading eastward across Europe, Asia, and then North America).
They've followed it up now with a trip from Scotland southwards to South Africa. I saw a promo for this before a movie last week, the film will be in theaters on July 31st only at 7:30pm throughout the United States. The selection of theaters seems decent, there are 3 showing it in Austin.
I don't know if there will be releases elsewhere in the world, but it will be on National Geographic Channel so keep an eye out there too!
www.longwaydown.com