I'm happy with the theme music, but I'm still making some tweaks. The theme is is the form of a Flash animation--a 2.7MB MP3 reduces to a 150K Flash file, wow! I changed it so it only plays once, instead of looping; I need to work on an on/off control. I've eliminated it here for the time being, but I have a version here if you're curious.
Update: Although I'd changed the Flash animation to play the theme music only once, it was still repeating. I thought I hadn't uploaded the edited version of the file, but I discovered that the HTML code for the Flash object was was set to loop playback. (D'oh!) I've adjusted the setting, so the music now plays only once. Once I add start/stop controls, I'll place the theme music on the main blog page.