Okay it's official html is majorly CONFUSING to me!!!
are you trying to get your right side bar up on the right side not underneath the left??? You need to widen your layout to 1100, in both spots under the main layout and then in the body. Then you need to add the html code for the third column to after the main body layout. EMail me if you need more help!!!
cough ~ cough ... is that you Kris? All this blog dust is clouding the screen. Kidding ... you're getting there. Keep going ~j.
Don't be shy...just write anything!