The creative diva that is Tanya at Munchkins and Mayhem did a super, super-cute shower for a friend expecting twins by a surrogate. I'm so over pastel pinks and blues and fluffy bears for baby showers. They seem so generic, but you can tell how personal this shower was, down to the twins' initials incorporated on the birdhouse place settings.
A fun shower theme if you want to focus on mommy, especially for a spring shower. Check out these other sources of inspiration:
Bluebird invitations from tiny prints and PaperStyle.
JannyPie's fab birdhouses and cupcakes make a beautiful tabletop, Flickr user bebe's beautiful blue setting, and creativity running rampant at Renovating a Brooklyn Limestone, I'm crazy over all the feathers! Lalalaurie's too hip color combo of blue and orange.