facebook group already exists and it has supporters.
I will look into those sources to populate the site with info.
Aside from it being new and empty, is there anything off the top of your head, as a backpacker, that would make you not want to use the site?
Another thing is that I don't know how the blog looks like because I can't find a link to it. So a Tour or Help would be nice, or a link to active blogs from the main page.
Other ideas:
Make a contest for newly registered users for a prize of something cool, e.g. iPhone4. Also make a mobile optimized version of the site, or an iPhone app, where the users can find, comment, upload images based on GPS coordinates.
Same things goes for the mobile version. I've had this conversation with many people and it always ends up in the chicken vs egg debate. Some people argue that having a mobile/smartphone add will increase user base, others agree to focus on the main site and have those as addons after I complete certain milestones
the header Travelers section has the blog info, but I will probably populate the homepage with them as suggested elsewhere