Time to jump on the bandwagon.  I've seen a number of postings of where folks have been using the cool map service at World66.  So here's my story.  First, the places I've been:

Wow. I need to find some time to visit the last few remaining states I haven't visited. I've also lived in a lot of those states (lived == more than 2 months residency.  Don't miss the blip in Washington DC):

Here's my world map. Soon I'll be able to add Malaysia, Singapore, and China to the list: