Here is what I've come up with based on everyone's comments:
Thanks for everyone's comments, by the way! When you look at your own design too long, you can't tell anything anymore (at least, I can't).
Also, I'm going to print the first (small) batch of these myself, but will likely do more later with either Moo or Vistaprint (I like moo more, but I like the deals you can get w/ vista). Anyone have other recommendations for printers?