I just looked at "Thread Tools" when reading a thread, and I LIKE what a see, feature-wise!
A choice to see a printable version of a thread! Whee!
A choice to email a thread to someone! Whee again!
I found another thing I like too - when replying to a thread, instead of my reply having precisely the same subject line as the beginning of the thread, it has a subject line unique to my reply. It prefills it with the overall thread title, which makes a lot of sense, but it lets me change it for my individual message if I want to.
Good stuff!