boing boing comment on it:
"Google accelerator is a scary anonymizer
Xeni blogged Polymorf's note about the new Google Accelerator being useful as an anonymizer, but of course you're not anonymous to Google, which knows about your search history (if you've got cookies on), your email address (if you register for Groups, etc), your friends (if you use Orkut), your email (if you use gmail), and even has your credit card (if you use AdWords or Answers). Anonymity from everyone except Google is nice, but it's not really anonymity, given how easy it would be to subpoena information from them (everyone knows where Google is), and given how much info this allows Google to collect and correlate on you.
This is an amazing service, without a doubt -- I'll use it for lightweight proxy-evasion, etc, but caveat surfer. It would be great to see Google setting up a Tor node with similar resources to this, though, and enabling some more robust anonymity."