Okay. Here's a couple:
AOL.com - go ahead and laugh, but their site is classy and the layout is table-free.
Sprint.com - ditto. They use tables, for tabular data, like their stock quote info, but that's what tables are *for*.

Commercial sites, especially big ones, are deep and take a lot of work to redesign and recode. Most of those probably aren't being torn down and rebuilt with CSS because there isn't an enormous return in doing it yet. This doesn't mean it cannot be done, nor does it mean that if you're starting a new site, or re-doing an existing one, that CSS can't do the job.

In fact, I'll bet it can. See the Zen Garden for a hundred or so examples of what can be done with only CSS.