The Top 26 Best Guerrilla Marketing Campaigns Of All Time
rasmussen.edu
rasmussen.edu
I'd much rather spend marketing dollars hiring a community rep and put up a site like spreadfirefox.
Sounds like they are also having a lot of success with a 100% volunteer based campus rep program. ("Any student that is committed to helping the Mozilla marketing team spread Firefox and the Mozilla mission through active participation in various campaigns and projects, both on campus and in their local communities.")
Probably not the right kind of marketing for all startups, but it is something to consider.