Not quite Lettermanesque, but eight reasons to use it.
http://blogs.msdn.com/tims/archive/2009/03/19/eight-reasons-to-fall-in-love-with-internet-explorer-8.aspx

>To have the newest toy on the block. *g*
>
>To spend lots of time waiting for the download because everyone else is downloading it today.
>
>I'm pretty sure we can come up with a Lettermanesque Top 10 Reasons list...
>
>>What the rush?