Hey Everyone...I just got married on August 8th in Carlsbad at a friend's home, about 50 guests.  I was going to go the ipod route but then (thankfully) went against it and hired Party Pam: 
http://www.partypam.com/.  She was wonderful!!!!  Great music, warm, friendly, and we had a true professional in charge of the music instead of relying on a family member to press ipod buttons.  She'd terrific!!!