Looks like third installment of Corner Shop series that was released in Japan in September 2007 under name "Tamagotchi no Puchi Puchi Omisetchi: Minna SANkyu!"
(Tamagotchi's Petit Petit Store-tchi: Everybody THANKyou!) is going to appear in USA in 18th of March 2008
(NOTE: The japanese name includes a wordplay as "sankyu" is "thank you" pronounced japanese way, and "san" means three
)Example Amazon.com has announced it with "preorder" status
I don't know is the third game any kind of different from the first two games, but it's sure nice to see the third (and propably last) Tamagotchi cornerstore simulation make it into the Western countries.