Update (09:25Z): Karl suggests travbuddy.com which has a finer granularity:
If I have not forgotten any place, I have been to 32 different countries or states:
AT|HR|CZ|DK|EE|FR|DE|GI|
GR|HU|IE|IT|MC|NL|NO|PT|
ES|CH|GB|CA|CR|GP|PA|US|
CN|JP|AE|TR|NZ|MA|RE|FI|
Since I last updated the map (Aug. 2008), recent-ish travels to new wonderful places took Vlad and I to [pointers are to photo sets on Flickr]: La Réunion island (Aug. 2013), Costa Rica (Spring 2012), Guadeloupe (Spring 2010).