Windows 7: Can someone ID that Hotmail icon for me?

See in the taskbar? I notice it says (2). I'd love to have something pinned down there to show mail...I am seriously thinking of switching to HM.

What is that exactly? Maybe just a mailpage thats open and shows the # of mails?

It's a feature of the pinned hotmail that shows the number of unread emails in your hotmail account.
New Notification Feature for Windows Live Hotmail on Windows 7 via IE9 - Softpedia

so how do I get that down there?

With your hotmail account visible and signed in, drag the hotmail favicon to the taskbar to pin it. I've found that it doesn't really work all that well and will only slightly work if the taskbar is not using small icons.