Kevin Newcomb at Search Engine Watch is reporting that Google has been sending termination letters to some AdSense publishers. The reason for the termination is cited as an "unsuitable business model".

Jennifer Slegg, the contextual advertising correspondent for Search Engine Watch, reports on her blog that arbitragers could take a hit from Google's upcoming AdWords Quality Score algorithm update. She discusses the impact to "Made for AdSense" sites, and how MSN and Yahoo! could be affected as well by the change. The full story is available at Slegg's blog.