Microsoft Advertising Intelligence (formerly adCenter Add-in for Excel Beta) is a keyword research and optimisation tool that operates seamlessly in Microsoft Office Excel 2007 based on historical and forecasted data from Bing and MSN search queries.
Already using adCenter Add-in for Excel Beta?
You need to upgrade to Microsoft Advertising Intelligence by September 1st 2009. After this date, the Beta version will cease to function.
Before installing the new version, you need to uninstall the Beta version.
I saw someone do a test on whether the UK data was reliable enough and they felt it broadly matched Google in that regard. Where this thing has always excelled though, is that it all happens right within Excel. You can generate thousands upon thousands of keywords in an under a minute and get predictive data for all of them.