Hello Everyone,
I just received my Ultimaker 2! Ordered December 30th. I can confirm Aaron's experience with the CF5106 form. FedEx never called me to fill this out. I ended up seeing that there was a problem on the tracking site and calling FedEx to see what was up. After filling out the paperwork and a weekend stay in New Jersey my Ultimaker arrived at my house.
Here is the link to the CF5105 form incase someone needs it. http://forms.cbp.gov/pdf/CBP_Form_5106.pdf
--Mr. Bates