Mine does not fit in any of the categories below, let me do it by myself (no worries, it's still easy!)

Aggregate blogs of like-minded people.

Blog about your backpacking souvenirs, upload your videos, pictures, create your own Lonely Planet.

Get a forum, mailing list to stay in touch with your classmates, visualize your locations on a real-world Map

Your own Planet Gnome, wiki, forum, screenshots directory. Works perfectly fine with Sourceforge.

More than just a simple forum... no installation, maintenance hassles, no spam!

more than just a simple wiki... no installation, maintenance hassles, no spam!