Since "everyone" on planet.debian.org does it, I'll just do it, too. Here is my list of visited countries:
I'm not 100% sure about how far to the east I went from the west coast, and where exactly I stayed at the east coast, but this is approximately it:
Have something to say? You can post a comment by sending an e-Mail to me at <mail@joachim-breitner.de>, and I will include it here.