I was looking to see when the game was going to be re released. I'll not post the URL of the site but this is what it says, (Source Joystiq)
"Although initially Nintendo advised Mario Party 8 was pulled due to wrong discs being included in the retail allocation, it seemed that it was in fact due to one word.
Nintendo have now advised that Mario Party 8 will return to store shelves from 3rd August, without any hint of "spastic" remaining. They'll be hoping that the game picks up from its strong first week performance in the UK charts, where it went top 5 before being pulled."
When its released Friday i'm going to buy it.