I received the following email regarding changes to Twitter's ToS, but it doesn't say what the changes were. How does the new ToS differ from the old ToS?
Hi,

We'd like to let you know about our new Terms of Service. As Twitter
has evolved, we've gained a better understanding of how folks use the
service. As a result, we've updated the Terms and we're notifying
account holders.

We've posted a brief overview on our company blog and you can read the
Terms of Service online. If you haven't been by in a while, we invite
you to visit Twitter to see what else is new.

Overview: http://blog.twitter.com
Terms: http://www.twitter.com/tos
Twitter: http://www.twitter.com

These updates complement the spirit of Twitter. If the nature of our
service changes, we'll revisit the Terms as necessary. Comments are
welcome, please find the "feedback" link on the Terms of Service page.

Thanks,
Biz Stone, Co-founder
Twitter, Inc.