100% height columns

i seem to be running in to this problem quite a bit lately. where in the body of the site i have two columns that may be different colors or have different content.

case in point - http://dev.paragongaming.com/river-cree-casino/
i would like the left hand side to scale to what is on the right hand side. Also, i would like to have that image on the left sit on the baseline of that area.

100% height never seems to work...

any ideas?

thanks for any help!

kmaier