I've made a few observations when using an 800x600 viewport: http://www.few.vu.nl/~rkg230/files/winehq-new-800x600.png
The text alignment on the left could be improved by having the next line start on the same horizontal position. The thing about the Codeweavers logo is not that important since on a real 800x600 screen, even more would be invisible (the browser window takes some screen estate).
Also, big chunk of white space on my native resolution (scaled down for easy viewing): http://www.few.vu.nl/~rkg230/files/winehq-new-1920x1200.png
Doesn't look THAT bad, but I could fit some screenshots in there. (Kidding, I'll stop about the screenshots ;-) )
Remco