Currently trekking across the Americas from Mexico to Canada along the continental divide is Cookie from Made in England. Along with his mate Paul he's been blogging the journey and they are both (after what seems like forever) just over the halfway mark now. It's terrific blogging and he and Paul are both doing it for Charity which you can check out over here
Just as exciting is that if he makes it back to London, Cookie has one of the best digital graphic design blogs that I know of. You can still sponsor him mile for mile as it's not certain that he's going to make it with his toes disintegrating as we speak, thus saving yourself a couple of dollars you cheap skates ;)
