Does anyone know of tools to assist in split testing Google Adwords ads? I currently use http://splittester.com to determine when one ad out-performs another, but with hundreds or thousands of ads I need something that will automate thisa. Also, since the ads will be swaped out in this split testing it is ideal if old versions are stored for reference so we don't use an old version of the ad. Anyone know of a tool or tools like this?