Last week Interbrand issued its 2008 Best Global Brands rankings. While most of the top 10 remained unchanged from 2007, with IBM and Microsoft swapping places (IBM rose from 3 to 2), one big change emerged: Google rose from 20 to 10, with Mercedes-Benz dropping to 11.  Interbrand produces this report annually, which is then used to produce a special report by Business Week.The report is generated from June 30th to June 30th annually, so while it does show quite a bit of financial firms dropping in global