To focus on supporting modern browsers, we are deprecating official compatibility of Google Analytics with Microsoft Internet Explorer 8 (IE8) at the end of 2013.
Above is a snippet from the latest blog post on the Google Analytics blog. The Analytics team have made the bold(ish) step of announcing the end of the line for IE 8 support in the next 3 months. It doesn't seem all that long ago when they announced they were dropping support IE 7 (and Firefox 3.5/Safari 3); but that was back in June 2011! Don't forget that they dropped proper support for IE 8 in a range of Google Apps like Gmail and Calendar last year, those users get basic HTML offerings with many features removed or read-only type views of the apps.
I'd love to see the analytics browser usage data for Google Analytics to see how many of their customer's are going to be affected!
I'm going to use this news as motivation to drop our legacy IE support (we still support even older browsers than IE 8 :/) - I'll let you know how it goes.