On AllForces.com today, there's this new post with a pointer to some PHP scripts that can interact with the iTunes Music Store.
Check out these PHP scripts that access the iTunes Music Store to grab the Album Art in all it’s 600x600px glory. Also, Benjamin Morin has posted on his blog a set of scripts (script only not demo) to access the free videos like trailers and music videos from the iTunes Music store.
Included in the scripts on this page are: