I wish other companies would borrow this "format" when they update their ToS. Even providing an easily accessible diff without me doing the work would be helpful. Too many times have I clicked on a ToS update to be directed to the new terms with a short note saying they're being updated on a certain date.
They provide handy diffs of hundreds of sites' ToS and privacy policies (and you can mail them to add others). You can also get Docracy to mail you when selected sites update their ToS.
[EDIT] - hmm, last updated in July, looks like they might have abandoned it :(
