After reading Five crucial things the Linux community doesn't understand about the average computer user I have a point myself. FIrst of all I disagreed with most of his points. Second of all the only aim of the Linux community is NOT world domination. Sure we would love more Linux users, and more Non-Microsoft users. But not at the expense of user stupidity. Here are my two cents on why people don't want to change to Linux ( or anything new ).
RoughlyDrafted has this absolutely amazing article about why Microsoft is fighting an unwinnable war against Open Source and FOSS. A must read for anyone. It was really well thought out and presented