Recently released figures about the costings for Barack Obama’s successful presidential campaign are yet another indication that online advertising has become a major deal for marketeers. Presidential campaigns cost a lot of money and while a large chunk of the Republican’s budget this time went on clothes, advertising is always the most expensive part. Traditionally, going back to the 40s and 50s, TV spending has been the biggest portion of any candidate’s budget. But online ad spending is clearly on the rise. Obama’s campaign spent $16 million on internet advertising in 2008, $7.5 million with Google and $643,000 on Facebook.…