Ted,
Have you used that new 70-200 f/2.8 IS for any extremely slow, long focal length pictures, yet? What'd you think?
Is this your first IS lens?
Did this one Wed @81mm @ 1/60 or so.
This one is @ 200mm and 1/60 sec.
Not the best sample as they are high ISO and subjects are moving as well, but I thought the guys might like them.
I also have the 24-105 IS and used to own a 28-135 IS lens. I'm very shaky so they help me a lot.