Good luck with this one!
I found that my friends and family really wanted to see us open something, so be prepared for gifts and not just gift cards. I suggest NOT registering for big things, or you'll get 2 humidifiers and stuff. Also check out what the return policy is at the stores at which she is registered. Some will only accept a limited number of returns even if you are registered there.
My aunts in TN went together and bought our playyard, I picked it up WA, and took a picture of it and brought the picture to the shower. Not quite the same, but still nice.
little clothes and soft things are always great, especially if you have a couple space bags, and vacuu-suck them down. You can get SOOO much little light stuff in a box or suitcase that way!
You could do a theme shower to narrow down what you want people to get...like a layette shower...
We had to suck it up and get a huge box at Office Depot and send it back to WA UPS ground. It cost $50 or 60, but it's so much fun opening it up and going through all of the baby booty all over again.
Good luck!
Dee