With help from Theymos and Genjix I wrote an article that describes why money is good, why the dollar isn't a good money, and why bitcoin is a good solution.
I wrote it for a new, not-yet-well-visited blog. The second half of the article is a pretty good layman terms explanation of Bitcoin. Please repost any or all of it wherever it will help people.
http://theanarchistmother.blogspot.com/2011/01/guest-post-solution-to-dollar.html