A few new bits of information mainly from CNN:

• Giffords is able to respond to “simple commands” which causes “cautious optimism” among the Neurosurgeons.
• Giffords is the only person remaining of the wounded to remain in critical condition. Three are in serious condition, six fair, one released.
• The “Suspected Suspect of Suspicion” … the second person of interest … has been identified and ruled out. He was just some guy. Conspiracy theories in three … two … one ….
• Official charges have been made against Loughner. PDF
• Papers or an envelopewith the words “I planned ahead,” “My assassination,” and “Giffords” have been found in Loughner’s home.