I guess I don't really agree with that train of thought. I'm with Shelley in that the last post column should not be so gigantic. I typically think it's better to set at least the last post column to a fixed width, if not all columns....
except for the main forum info column. That is really the one that should expand with wider resolutions and be significantly larger than all other columns on any resolution.
When you have such lengthy forum descriptions and subforums as you do here at vB.org, your forum info column gets cluttered...and the last post column looks pretty sparse since it's so wide
That's just my $0.02