Well...I might be the odd one of the bunch. I run on Window Server, currently using Windows Azure using IIS thats built in (Production and Development). The current generation of IIS 7+ is much like NGiNX, it is very lean and only runs what you want, easy to configure as well, very readable XML based files. I know most people scuff at the ideal of using Windows as a server, they ramble on about how so insecure it is compared to Linux blah blah blah. A server is only as secure as the one maintaining it. I've maintained both Linux and Windows servers quite frequently. Linux is not a silver bullet, don't maintain it and it will be compromised just the same. (In reality, its not actually the server OS that is the weak link, but the applications that run on top.)
Windows Azure has grown quite a bit since it first released. It is no longer Windows exclusive you can actually get a Linux machine, directly from Microsoft! They offer, last time I checked: CentOS 6.2, SUSE Distributions, and Ubuntu Server. If you don't like those choices you can upload you own as well. If you don't care about running a static virtual machine but do not want to use IIS, you can just use a worker role and install your own web server if you like. But you will be responsible for setting it up.
Anyways, ever since PHP 5.3, Windows has become a first class citizen for PHP. Performance and support has greatly increased make it a very comparative platform (concerning the LAMP stack) to running PHP. So I see no reason to scoff at the idea of using Windows for both development and production.
I should cover databases...well I stopped using MySQL a long time ago. Depending on the application, I use SQLite for pretty much everything that does not need a full blown relational database, plus its built into PHP doesn't need anything extra. When I do need a full relational database, I either use PostgreSQL or Microsoft SQL Server (SQL Azure), PostgreSQL has always been better then MySQL in so many ways, its a shame hardly anyone ever gave it a try.
I rambled on enough for now...I have work to get back to.
Err I should add, I use 5.3 and 5.4 (for new stuff) setup using FastCGI.