I just got my 2013 a couple weeks ago. I ordered on 18 July, it "officially" went into production on 31 July, and I picked it up on 28 August. If you gave your dealer your email address, you'll receive email updates from Jeep.
If you have a VON on your order sheet already, you can track your Jeep at:
but it's not updated as quickly; calling 877-IAMJEEP (426-5337) once you've been issued your VIN will get you more up-to-date info, but the "good" information seems to be based on the rep you happen to get on the phone.
Also, definitely hang out in this thread here: www.wranglerforum.com/f33/2013-jk-order-waiting-room-164814.html
One of the awesome members here, keschete, can look up your Jeep's status as it goes through the stages if you PM her your VIN.
Congrats on the order!