Visual Studio 2008 Virtual Host Rabbit Multiplier

I took a ride on the MAX today, just to do some thinking and get away from downtown for a little while.  On the way back from the west side I’m sitting and just typing away at some code.  I’m not hitting F5 to run or anything, just merely typing some code and then saving, then viewing the web page.  The web page was appearing just fine.  But on the background I noticed that the virtual hosts where multiplying like rabbits!

Has anyone ever seen this?  What in the world is Visual Studio doing?  Is it just launching a new one of these every time I force a build by saving and viewing the URI?

I closed down Visual Studio 2008 but I’m watching to see if this repeats itself.