One of the more interesting parts of the interview (I thought) was when Alex was asked why he didn't do another solo album. He said that he'd love to but hasn't had the time. He added that he really enjoyed playing with other people and mentioned the recent collaboration with Porcupine Tree.
Don't know about you, but I could stand to hear more of Alex working with other bands/musicians... as long as it doesn't interfere with Rush commitments. :-)