I am not really a fan of this (though it seems like not that different than what the review was meant for in the first place (unlike, say, construing a like on facebook as an endorsement of that thing), but complete lack of interest in associating myself with reviews of a company or product is why I don't write reviews with my G+ account in the first place), but I am a fan of publishing a diff of Terms of Service changes, especially with a nice plain-English summary at the top.

Of course, without this coverage, I don't know how the vast majority of people would have come across this page[1]. I don't appear to have been notified in my gmail account. To be fair, though, I've grown to hate the near constant ToS change emails I get from paypal, so there's some balance to be struck there too).

edit: actually, I take back my last point. I get a big blue bar on top of google.com notifying me of the change, and it's not even a "click here to see a ToS change" that I would never be interested in enough to click on, it's "Our new Terms of Service update how we display your information in content & ads." with a "Learn more" link. Still wouldn't want to be involved with the feature, but good for them for handling it like that.

[1] http://www.google.com/policies/terms/changes/