Emails are in backlog, because everyone is in the warehouse shipping.
Per the latest kickstarter update if you sent them an email before the 21st of July, it -should- be properly updated. If it isnt, and you did send an email, theyll cover the mistake and correct it as soon as they can.
If you didn't, they can ship you another one once your old one comes back as undeliverable, but you'll have to cover shipping.
Your best bet is to contact FedEx, explain that you are expecting a package and it may be getting shipped to your old address. They can look up through the address+your name, and then, assuming it hasn't been shipped yet, put a notice on it to re-lable it to another address. It will be a small charge, but you're far more likely to get it done and fixed this way.
If you are quick and they haven't shipped it out at all yet, you should be really luckly. If they have shipped it that charge may be a bit more than small, to move that package back across the country :/
Otherwise, your only bet is to wait and see.