In a move to bolster its technology news coverage and to grow its online audience, CBS Corporation (NYSE: CBS) has offered $1.8 billion in cash to acquire CNet Networks (Nasdaq: CNET). The $11.50 per share price tag was a 40% premium over the closing price of CNET stock on Wednesday. In a conference call, CBS's CEO Leslie Moonves explained that CBS was attracted to CNet's sizable online audience. The two companies can also reduce expenses by combining operations and boost spending by advertisers across two ad platforms. Websites operated by CNET include technology news hub News.com and BNET.com, a business resource portal. (Disclaimer: FinancialContent, a sponsor of this blog, is a provider of online financial channel solutions to both CBS Corporation and CNET Networks.)