Last week, the famous blog search website Technorati received a new investment of $7.5 million, bringing their total investment to date to $30 million. ReadWriteWeb once conducted a survey among users regarding which blog search service they used most frequently, and 41% of the users chose Technorati. However, there is no doubt that Google's blog search is encroaching on Technorati's territory. Moreover, many people claim that they don't use specialized blog search services because Google's general search is already sufficient for them. Today, Technorati launched Technorati Media and will begin developing a blog advertising business.