Yahoo has launched two new search apps for the iPhone Sketch-a-Search http://itunes.com/apps/yahoosketchasearch and Yahoo Search http://itunes.com/apps/yahoosearch Yahoo has partnered with more than 80 leading carriers and original equipment manufacturers around the world to deliver what it calls a “an industry-leading mobile search experience” and Sketch-a-search certainly fits the bill. Here’s Yahoo’s explanation of it Yahoo…