This is a major drop from the price at play
http://www.play.com/Games/PSP/4-/10287942/Sony-PSP-Go/Product.html
Thought the release date is almost identical.
I've seen some good reviews but sales in the States were rubbish. If it's not a party game people won't buy it on the Wii. At that price we can all prove them wrong.
I had a quick look but there is no mention of it. Sorry I can't be of more help. I guess if you tried to order it with your address and see if the site has trouble with that.