fside - 11:42 pm on Feb 27, 2008 (gmt 0)
You don't really see a lot of the old 'single image' rollovers anymore, whether the slices are floated in or part of an elaborate row and col span table. If you do see something of the sort now, it's probably Flash. I would think the slices themselves would have to be the same, if you intend to mimic the slicing used in table. I wonder if you could count on various browsers to float everything as you imagine? Not all pass the acid2 test.