Regarding tables, might as well work with a grid-like system, depending on what kind of content you want to use it for. In the case of an art shop or gallery, I'd actually prefer a grid over a table. Probably because tables are generally only used for (and should only be used for) data.
I'm not entirely sure how and if a grid system would work very well in posts, though, considering the different kind of widths on all the themes, because generally a grid needs to be in a fixed width. Could always work with a minimum though.
Actually, think I might have a look and see if i can do anything.
edit: i need to check dates more... argh..