The free GardenFlower Theme for WordPress 3.0 is 1000px wide with 2 columns. It comes with 9 widget areas and about 40 theme options. The sidebar ist designed for 300Px Adsense Ads.
Auto thumbnails for postings, excerpt or full post for start page etc.
The themeoptions give you besides many other options, control over the look of the widgets. You can choose between widget look, posting look and text-only look etc.
There are also options for ads, which will be convertet into shortcodes, to place them into postings, widgets etc.
The license of the theme is GPL