LinkedIn Corp (NYSE:LNKD) had a higher market cap than salesforce.com, inc. (NYSE:CRM) for the second week in a row, ending at $32.56 billion last Friday compared to a Salesforce market cap of $29.59, writes Alex Williams for TechCrunch. Salesforce was the first software-as-a-service (SaaS) company to pass $1 billion in revenues, but it may have to give up the mantle as industry leader. LinkedIn’s income LinkedIn Corp (NYSE:LNKD) is best known as a social networking site for professionals, but a large portion of its income actually comes from SaaS and the customer relationship management (CRM) market. LinkedIn has an advantage over…