I've just published another article called 'Globbing up javascript' that covers the basics of Dir.glob and how it can be used to clean up all the javascript (stylesheet, etc) include in your layouts. If you've gotten frustrated by having to maintain that 'golden list' of javascript files or ever been frustrated when some piece of javascript logic for your Web2.0 app failed to appear because you forgot to update the list then head on over and check it out. If not, you might still find it a useful technique for your bag of tricks.