Article from the AP about a click fraud lawsuit. This is the first lawsuit Ive heard of being filed against Google and other pay per click engines.
A Texarkana gift shop that advertises on the Internet has filed a lawsuit against America Online, Google, Yahoo and other Web-centered companies alleging they knowingly overcharged the shop and other companies for "pay per click" advertising.
Lane’s alleges a conspiracy in which the companies worked with one another to create an online environment that harms advertisers.
This might be pretty hard to prove but will be interesting to see what happens.