OmniWeb and toolbar search bar revenue generation?

Hi,

John Gruber ad Daringfireball claims that Safari is "already one of  
Apple’s most profitable software products" due to the revenue from  
Google for every use of the search bar in the toolbar; the same  
happens apparently with the Mozilla Foundation. As indicator he  
mentions the "client=safari" string in the URL.
<http://daringfireball.net/2007/06/wwdc_2007_keynote>

Big question now: Why doen't OmniWeb has a similar feature? I for one  
would be more than happy to search via "client=omniweb" if this  
brings additional resources to the OmniTeam (yes, I am a fan of Omni  
software :-). Or does this happen already, and it's a kind of big  
secret? At least, I did not find any "client=" string when using the  
searchbar in OW.

Cheers, Kei.