Nationality: Dual - Indian origin, living in England.
Age: 15
Countries visited: 15 - that is, England, Wales, Eire, France, the Netherlands, Italy, Russia, Germany, Denmark, Canada, Australia, India, USA, Nepal and Belgium.
Age: 40
Country: Belgium
Countries: 18
Netherlands, Germany, Austria, Switzerland, Italy, UK, France, Spain, Portugal, Greece, Turkey, Croatia,
Luxemburg, US, Mexico, South Africa, Swasiland, India.
Dutch citizen
29 years old
22 countries visited: Belgium, Germany, Luxembourg, France, United Kingdom (specifically England and Scotland), Ireland, Spain, Portugal, Italy, Austria, Switzerland, Liechtenstein, Andorra, Monaco, Czech Republic, Greece, Turkey, Singapore, Malaysia, South Africa, Mexico, United States. I’ll toss in Vatican City as a bonus. 
Here’s an older thread on this very topic.
Nationality - U.S.
Age - 54 (but pretty much had my traveling done by 28)
38 or so (some of the countries, I visited are now different places, [Ceylon, Cambodia and Burma], more places [Yugoslavia and Micronesia] and controled by different people [Hong Kong and South Viet Nam] and I’m still trying to figure out Cyprus.
Let me run them here just for the heck of it: South Viet Nam, Cambodia, Micronesia, Japan, Korea, Hong Kong, Philipines, Indonesia, Malaysia, Thailand, Burma, Bangladesh, Ceylon, India, Nepal, Pakistan, Afghanistan, Iraq, Iran, Turkey, Isreal, Egypt, Cyprus, Greece, Yugoslavia, Italy, Switzerland, France, Germany, Luxemburg, Holland, Belgium, England, Scotland, Ireland, Iceland, Canada, and Mexico.
Everything except Mexico, Canada and the U.S., of course, were done in a seven year trek around the world pretty much by thumb (it got a bit challenging when I ran into oceans though, but managed it by working or trading my way across).
TV
Age: 29
Country: United States
Countries: 7
Costa Rica
Nicaragua
Mexico
Canada
France
Germany
Italy
Nationality : Australian
Age : 24 (yesterday!)
Countries : 18
Nationality: US
Age: 40
Countries: 6 (Canada, Australia, Dominican Republic, Italy, Vatican City, India)
But I am planning on increasing that number in a couple of years.
Nationality: Australian
Age: 42 (urghhh)
Countries: only 3…Indonesia, England, and Ireland.
(But I’ll go back to Ireland anytime anyone wants to sponser my trip…Wheeeeee…those pubs in Miltown Malbay were a hoot!!)
Oh, and Happy Birthday for yesterday Goo!! ;j
Nationality: American
Age: 23
Countries: 0
States: 3 (only including the actual destinations, not just passing through)
I haven’t traveled much at all, and I don’t really care to. I figure that I may go to Canada some day, other than that I might never leave the US.
Dammit. Sorry about the repeat, I did a search first and couldn’t find anything. must try harder!!!
American, age 60.
9 countries, including:
Canada
Mexico
Japan
Hong Kong
Indonesia
Sri Lanka
Oman
Israel
England
UK, aged 29 and 36 months
USA (lived for 6 years), Canada, Mexico, Carribean (various islands but count as 1), UK, Scotland, Ireland, Wales, Netherlands, France, Belgium, Germany, Sweden, Finland, Norway, Spain, Italy, Monaco, Switzerland, Greece, Egypt, Morroco, Zimbabwe, Zambia, Botswana, South Africa, Angola (briefly), Hong Kong, Singapore, Macau, Australia
Wow, thats about 30; more than I thought
Nationality - Irish
Age - 25
Countries - 13 (but will increase very soon!!)
UK and Scotland and Wales…? Don’t you mean England?
Nationality: Swedish
Age: 29
Countries visited: 29. All Great Britain is one country and I am not counting places like Iceland, Turkey and UAE where my plane has stopped for refuelling but I´ve never been outside the airport.
Nationality: Canadian
Age: 20
Countries: 4. Canada (coast to coast), USA, France, Spain. (Not counting changing planes in Amsterdam.)
Quite right! I think you have to spend several days in a country before you can say you’ve visited it. I have a friend who solemntly told me exactly the number of countries he’s been to (20 or so) turned out he includes travelling through France and Belgium on the way to Germany even though they only stopped in those countries for coffee! Somewhat childish I think.
Oh yeah - I’ve visited about 8 countries for more than a week. NOT counting Wales and Scotland as they are part of the UK. “Passing through” would add about another 10.
Nationality: US
Age: er, 47
Countries visited: 20
Angola, Antiqua (West Indies), Belgium, Canada, Ecuador, Egypt, France, Guatemala, Netherlands, Italy, Monaco, Peru, Spain, South Africa, Switzerland, Tunisia, Trinidad, UK, Vatican City, Zimbabwe
Countries landed in while in transit: Belize, Gabon, Mexico, Portugal
Scottish, 56
lived and/or worked in:
England, Scotland, Wales, Eire, Netherlands, Belgium, Germany, Italy, Spain, Iraq, Iran, Jordan, Kuwait, Saudi Arabia, Bahrein, Libya, USA (18+? states), Canada (18)
visited:
Russia, Tadzhikistan, Uzbekistan, Greece, France, Jamaica, Mexico, Lebanon, Syria, Switzerland (10)
28 so far, more to come (I hope)
P.S. I am Scottish first, British second (by a neck), European third (by a distance), I will count England, Scotland, Wales as separate countries.
Sparrow,
I agree stop-overs don’t count, especially if you don’t leave the airport. But I do think a full week is a bit harsh as a time cut-off time for counting visits to a particular country.
If you leave that stipulation in, I then have to cut a few from my total:
Japan (5 nights), Fiji (5 nights), Solomon Islands (3 nights), Zambia (3 nights), Belgium (3 nights x 2), Morocco (1 night). 
That leaves UK, Rep. Of Ireland, Iceland, France, Netherlands, Spain, Germany, Czech Republic, Italy, Bulgaria, Greece, Denmark, Singapore, Australia, New Zealand, Canada, USA, Mexico, Peru, Botswana, Zimbabwe & South Africa. I think.