There is a great post from Scott Hanselman regarding node iis. It is the implementation of node on iis. Node is basically a serverside javascript. It is very interesting to me how this could be used. I wonder if the performance of this would allow you to skip the overhead of a .net page load, similar to a handler.
Here is the article:
http://www.hanselman.com/InstallingAndRunningNodejsApplicationsWithinIISOnWindowsAreYouMad.aspx
I plan on testing this next week and will report back with any thoughts or issues.