Comment GCF Global Learning's free tutorials (Score 3, Informative) 33
Originally funded by the local Goodwill in Raleigh-Durham, North Carolina, GCF offers instructor-led online classes, as well as free training materials, for all sorts of classes, from "Computer Basics" to "Access 2002." The best part is that they also offer free materials for OpenOffice.org software!
The UN-funded International Open Source Network has an excellent "Intro to Linux Desktop" course at http://www.iosn.net/training/end-user-manual/. That page also has links to other free software training materials.
You should totally write up a detailed account of what you're doing and submit it as a Slashdot story -- I'd be interested to hear more. Or do you have a (shudder) blog?
Good luck!