How to detect if I am vulnerable to "Superfish," and how to remove it?

The site has already a discussion of the security risks of "Superfish". It seems to me that anything that tampers with the bits of one's connection is bad. If it tampers with TLS connections, it is evil.

How can I determine if I am vulnerable to Superfish?

Lenovo has issued a statement on Superfish (after they got caught red-handed) saying it has been "disabled."

As I can no longer trust Lenovo, is there a way to remove it completely other than format c:?

Edit: the Lenovo statement linked above now has a list of model numbers on which Superfish may have been installed. Um, but it says "appeared" rather than "installed," rather like it sneaked on those computers in the middle of the night.