Internet Explorer 10 launches on 10/26/2012, and as a result, we will discontinue support for Internet Explorer 8 shortly afterwards, on 11/15/2012. After this date users accessing Google Apps services using Internet Explorer 8 will see a message recommending that they upgrade their browser.
Google Apps update alerts: Supporting modern browsers: Internet Explorer 8 support discontinued

I suppose this move will impact Windows XP users the most!