Waxy.org: Daily Log: Search the iTunes Music Store: boom, there it is.
Dang, that took, what, nearly a week? Geez, this LazyWeb thing, it’s just, I dunno, lazy!
(ahem. In all seriousness, HATS OFF, Andy!)
Andy’s offering hosted access to the search script on his site “until it gets too popular.” Meantime you can grab it yourself and install it if you should be so inclined.