My experience is similar to that of peterleinchen and mrsellout:

I also got the notification about customs foo.
I forwarded the "Jolla Shop: confirmation for your order #...." e-mail to TNT with the reference that TNT gave me for this case and everything went incredibly smooth.
Even though all this happened on a Sunday, they reacted within a few (~3) hours and I could see that my package was forwarded that same day.

PS: For the order to Germany, the invoice actually lists the VAT:
SAILFISH COMMUNITY DEVICE PROGRAM SCDP-1606 1 €136.29
Subtotal €136.29
Shipping & Handling €0.00
Germany* (19%)
€25.90
Tax €25.90
Grand Total €162.19

According German regulations, the price before taxes is low enough that you do not have to pay customs, only VAT, which was already paid by Jolla.