After missing X14, and having a horrible experience with conductive flux from China, I set the project aside for a while and focused on other things.
Tonight I soldered up another board and got it working! Lots of pins have changed, and V-USB will be introduced, so I have days if not weeks ahead of me coding the firmware for this little guy.
Anyway, here it is, with its blinking LED saying "Hello world! I am alive!"