Quoted: Most search marketers focus on Google, Yahoo, and Microsoft. But B2B search marketers also have a growing number of vertical search options. Clicks and leads from these vertical search sites may not yield the same traffic as general search engines, but the percentage of qualified traffic and conversions can increase dramatically with leads from these specialized and vertical business-oriented engines. Here's a roundup of the most important search sites and resources B2B search marketers should be targeting.