Seven of the most interesting SEM news stories of the week

by Christopher Ratcliff
Welcome to our weekly round-up of all the latest news and research from around the world of search marketing and beyond. This week: Google begins experimenting with its PLAs, there are some stats on ad spend, we answer “what is the most trusted media source?” (I’ll give you one guess) and there’s a very tenuous time-frame for when Penguin is arriving.Read the full article