let people know if their computer may be host to malware based on the proxies the computer has been sending requests thru. From the article:
"Google is putting up a notification at the top of Google web search results to users whose traffic is coming through the proxies. The notice warns uses that their computer is infected with software that intercepts their connection with Google and other sites, Damian Menscher , a Google security engineer said in the post."
Malware likes to set up proxies so baddies can intercept web-traffic. Naturally these proxies have to belong to the baddies, or at they at least have to have some control over them. Also, known malware tests to make sure its online by going to a well known IP (like Google) via a proxy to ensure that the machine is online. Well Google puts a nice banner at the top of your
search results letting you know it thinks badness is afoot. The official Google Blog is posted here.
It's an interesting concept, your search engine not only giving you search results but also telling you if can possibly be infected. Such a nice idea-- like someone is looking out for you. But is it also kind of creepy? Or-- is it a sigh of relief? More importantly-- why aren't AV companies picking up on it?