The forums are lighting up with confused users as it looks like Hotmail has a fancy new icon on BIS email folders. It started a few days ago, and while know one really knew just what was up at first, some keen eyes figured out it is indeed Hotmail's doing. It could be part of BIS 3.1 as some users have even seen Yahoo! icons as well, but only time will tell. No fancy stuff for Gmail or other services yet, but perhaps in the near future the standard globe icon on email folders will be replaced with fancier icons. If you're looking to discuss more, there are loads of threads in the forums on the topic. Thanks to everyone that sent this in.
Image Credit: NoahFecks