Apple's senior vice president of worldwide product marketing, Phil Schiller, has responded to concerns over App Store policies for a second time. This time to Panic co-founder Steven Frank personal boycott on developing applications for the iPhone.

Mr. Frank said on his blog that the email reply from Mr. Schiller could be summed up as "We're listening to your feedback."

Mr. Schiller also told him that concerns over wide-spread blocking of ebook readers at the App Store -- Apple's iTunes-based store where iPhone and iPod touch owners can purchase applications -- were unfounded, but that one specific ebook reader had been rejected because it allowed iPhone users to share potentially copyright protected works.

Mr. Schiller's email came in response to earlier blog posts from Mr. Frank calling Apple to task over iPhone application rejection policies and the apparent lack of consistency in how they are applied. In those posts, he targeted Apple's rejection of Google's own Google Voice application and offered some suggestions on how Apple could improve the application approval process.

Last week, Mr. Schiller responded to Daring Fireball's John Gruber about his report that Apple was censoring specific words in one company's dictionary application. Mr. Schiller said the developer chose to block certain words itself to get its application in the store ahead of Apple's new 17+ rating system.

While the likelihood that Phil Schiller plans to personally respond to every publicly voiced concern over App Store policies is slim, he has at least made one point clear: Apple seems to be listening.