The mobile app versus mobile web debate, a concept made famous by Steve Job’s walled garden vision of the Internet, has been highlighted again, this time by Google.

Just before the start of the Labor Day weekend it announced it was cutting off AdMob support for mobile web sites seeking to monetize their mobile web content and pushing them onto its AdSense ad platform. Mobile app developers will continue to use AdMob.

To mobile web developers and those few companies that have utterly committed to their mobile strategies this is big news and undoubtedly a hassle too (something even Google alludes to in its blog post: “We know that these sorts of transitions can cause our customers some extra work….”). …