Is Amazon going to be under siege once again from the blogosphere, this time in regard to a policy change pertaining to mobile use of its Product Advertising API?

That may be the case, as bloggers and Tweeters take up the cause of developer and Delicious Monster CEO Wil Shipley, who had to pull the iPhone version of his popular program Delicious Library due to Amazon's Advertising API guidelines. Delicious Library is a Mac-based media library system that has previously won Apple (NASDAQ: AAPL) design awards.

At issue is an Amazon (NASDAQ: AMZN) clause dating back to 2007, according to Shipley, that states "You will not, without our express prior written approval … use any Product Advertising Content on or in connection with any site or application designed or intended for use with a mobile phone or other handheld device."

Shipley, who was using the Product Advertising API since before 2007, but for Mac computers and not iPhones, was unaware of the clause until Amazon lawyers contacted him. They demanded he remove the program from the Apple App store.

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