I see a former poster here doesn't like us. 
Anyway, you could have picked a better song. Other than that, good job.
hard to find a good song thats a minute long, its an intro to a cd.
Good stuff, xmusc, thanks for putting it together. While I might have liked something a bit more uptempo also, the song isn't bad either.
Also, so far as the time issue, I think there are a number of things you could do to make that less of a concern in choosing your song. I don't know how familiar you are with audio editing or what type of computer you're on, but I think you can import an mp3 file into GarageBand, Audacity (a free Mac program) or Audition/CoolEdit and cut it up from there. Those sorts of programs are fairly user-friendly and I think would allow you to make cuts at whatever lengths you like and add fades and other volume dynamics wherever you see fit to make it work.
Again, not sure what you're using and how much time you're looking to devote to the mixes, but I think those are options that might be worth considering.
That said, having never made one of these before, I bring it up only because you mention the issue of time and music. I'm in no position to criticize, and I enjoyed the mix. Keep 'em coming!
-sw