This is a nice idea I found this thru Peter Koen's blog. I think Alaska should be listed separately. It is a too much big chunk of territory by itself, but it gets colored when you check on USA.
create your own visited country map
or write about it on the open travel guide
Haven't checked if I can create another map for the places I want to go. What about my favorite countries? Nah, this is one of the worst ideas I have ever had! ;)