Writer here, with published book. I'll do my part and help with literature.
I think the best way to get more people using Ubuntu is with a Free Geek chapter/francise. I've been trying to start a Central Florida Free Geek. This is the land of over-consumerism, and lots of old equipment is around. I've given out over a dozen Ubuntu 'FreeBox' computers so far. My biggest challenge is the wireless part. Most people who need and want a computer, but can't afford one, can't afford an Internet connection either. So, I try to get them linked up wirelessly. Anyone want to get a cantenna production line going? [URL="http://wiki.freegeek.org"] The FreeGeek Wiki[/URL]
If we can get older computers into the hands of people who need them, we can get more Ubuntu computers being used, and eventually have more adoption that Mac OS X. If we can do that, the software that everyone wants (Photoshop, Quickbooks, etc) will take notice and make software for those who want it. I'm happy with my free stuff (GIMP, GNUcash, etc), and I'll continue talking it up.
It's late, and the idea machine needs sleep.