Some time ago I have found few interesting links
Haven't found url for the windows. Google hate (or fear ?? LOL) microsoft/msn.
If you will search at them, you will got much less results as at the normal search. It seems that it's some kind of joke from google.
Another issue about where that search are used? Is it popular search? I mean if it's popular it will be much more simpler to do alternative SEO for that searches - becouse of the small amount of the results... Another point what is required from site to be placed at that search? Maybe including word MAC or LINUX or BSD into anchor text... Mac+Linux+BSD+Google start war against MSN/microsft?
Just kiding :)
In any way questions are still open - do that searches are popular? Where do they used? How to put site into that SERP?