A lot of development of PHP based web sites is done by individuals; but mostly when it comes to hosting maybe 90% of them host them on Linux or BSD based servers. One major reason being the performance. Also there is few hosting companies and people who recommend PHP based sites to be hosted on Windows Servers. How ever this is not a news which will be very welcomed by the open source community. There will be others who might take this as a positive move too. Maybe the road to PHP#? :P So next will be mySQL? Maybe Microsoft has finally started to realize that ASP sucks ? and that they can't beat the OSS community and its best to join them, if they can't beat them? Who knows. Its a well known fact that Microsoft has used code from the open source communities. Example a lot of the network layer of initial Windows 2000 code used BSD code. Also the new vista has been working hard to mimic the look and feel of Gnome, KDE and even Mac OS X. And yeah the "power shell"? a replacement for the weak CLI in windows. Anyway thats a totally different story, which will lead no where. The best answer is stick to something which you are confabulate and easy with. Thats the best choice for you. Be it Windows, Mac, Linux or daaa! a PS3 (woo, Linux again)?
This move might be something good for most M$ Maldivian developers, who really are used to the M$ stuff. Lately PHP has also gained a lot of popularity as a web development language. We do have a few ASP guys too, but I would say most people still prefer PHP over ASP. I remember a time back in early 1990's foxpro was the thing here. Back then if you tell them about a language like VB they will joke at you. Late 90's that changed and by mid 2005 its now M$ dot NET. Even the government want to move to .NET platform and M$ SQL? People hardly look into other options like Java and Java based frameworks. Same goes for even PHP, I only know a few developers who have worked with PHP frameworks, like Cake and seagull. But these are good options to look into if you are into PHP, makes your life a lot easier. Also there is other alternatives people can look into like Ruby on Rails and Python with Zope. Personally I don't have much experience when it comes to web development, so I don't wanna comment more on the topic. But my guess is the reason why most hardcore developments with PHP is based on *nix hosting is beyond performance issues. There is a lot of advantages that you get on *nix over windows, when it comes to servers.