While Twitter and Facebook are all the rage with your average internet user, blogs are still going strong in the corporate world. According to a study by eMarketer, 34% of all US companies have a public blog and they project 45% by 2012. That's up tremendously from 2007 which lands at only 16%. "Studies have shown that marketers perceive blogs to have the highest value of any social media in driving site traffic, brand awareness,