How long have you been married, liketom? I think it could be kind of cool to play off the info at the bottom of iTunes that tells you how long it would take to play all the music in your library...the "X items, Y days, Z GB" thing. If you could personalize that, either by figuring out how many songs it would take to cover the number of years, or changing "items" and "GB" to something different (and "days" to "years"), it could be pretty neat.
I don't know...I'm just thinking outloud on too little sleep, I think.