One of the things that can be (quite stupidly) complex to do is to make a footer stick at the bottom of the page even when the content on the page doesn't make it extend to the bottom, but it is possible. If you require that then let me know.
Yes this is one of the reasons I've resisted change for so long... most of my sites are vertically liquid too.
Obviously in the versions above, it'll look like 4 rows (grey,white,grey,white) when maximized on a large monitor.