Alternate theme?
 

OmniWeb looks great in Leopard. Much better than it did in Tiger. That's not to say it still couldn't be improved upon. Maybe something along the lines of the HUD type windows used in other Apple apps? Just a thought. I saw this one for FF3 and thought having a dark OmniWeb browser might be interesting.

[URL="https://addons.mozilla.org/en-US/firefox/addon/4908"]NASA Night Launch[/URL]
[IMG]https://addons.mozilla.org/en-US/firefox/images/addon_preview/4908/2[/IMG]

Here's a screen grab of just some color updates for the toolbar (not a dark theme).

[IMG]http://www.kellener.com/steve/webpics/misc/omniwebgrab.jpg[/IMG]