A new study from search-marketing firm Covario,  shows that customers representing more than 120 technology brands at major tech companies such as Adobe, Lenovo and Intel, spent 14.3% of their search advertising budgets on Yahoo in the second quarter of 2008, up from 10.3% for the prior quarter, but still down from 18% a year ago.

Google’s share of those customers’ search advertising dollars declined to 81.2% down from 85.6% in the first quarter of the year.

Overall Google’s overall search advertising spending by Covario customers jumped 43% from a year ago.

But now, there also appears to be some good news for Yahoo. It’s the first time since the first quarter of 2007, when Covario started collecting data, that Yahoo has gained share among its clients while Google has lost. Covario estimates that its clients will spend roughly $240 million on search advertising in 2008.

Advertisers in the Covario study paid and average of $1.16 per click for search ads on Yahoo in the second quarter, compared to $1.09 on Google. The gap in the first quarter was much wider: an average of $1.59 per click at Yahoo and $1.13 per click at Google.

With advertisers paying $1.16 a click and $1.09 per click, I don’t see it trickling down to domainers.

So it must be going to those companies bottom line.