Online advertising technology provider WebVisible just published its third quarterly Small Business Online Advertising Report, including a look at U.S. advertising from Q109 through Q110, representing 12,000 advertisers spending $23 million on the Web.

Here are some eye-opening overview statistics:

* The average small business advertiser increased its online search ad spend with WebVisible by 91 percent year over year, for an average of $2201 each.

* The trend was for more Bing and Google searches, and fewer Ask and Yahoo dollars. Bing increased 10 percent, Google was up 3 percent.

* Yahoo click-through rates improved 138 percent year over year, Bing’s went up 53 percent, and Google’s increased by 29 percent.

* Cost per click remained stable, after a high in Q109. “The stabilization indicates that the search marketplace has reached a level of maturity for small business advertisers, and may not support higher prices, even in the face of increased competition as advertisers add keywords and shift spend to avoid higher CPCs,” read the report

* In just one quarter – Q409 to Q109 – clicks increased their conversion to phone calls with trackable numbers by 35 percent.

* All types of conversions increased QOQ, though videos topped at 23 percent, and form fills came in a close second at 21 percent.

* The most popular advertiser categories in Q110 were attorneys, general contractors and dentists, while those that spent the most were attorneys, roofers and plumbers. General contractors and landscapers spent less than the average.

Request a free PDF copy of the report here.