Clemens asked to testify. It is being called an invitation, not a subpoena. So we shall see if he attends.
We'll also see if Clemens learned anything from Bonds. He's kind of screwed. If he pulls the McGwire, he destroys his legacy. If sticks to the B-12, Lidocaine story, he will likely end up with every investigative journalist in the country following him around. A new book next spring - The Rocket's Shadow?