Interesting stuff you guys do, diversity is awesome!
Myself, I have very basic setup here in my home/office for LAN/WAN. I run a Windows XP server for my personal website and recently a forum (I missed phpBB) and it acts as a music server for the office. I was using the latest version of xampp a few days ago and then switched to xampp 1.7.7, since I felt nostalgic for phpBB2 (I wanted to try the ADR RPG MOD again) and wanted to be ready for phpBB 3.1 at the same time. I'm behind a router and using a software firewall. I really like to have the control over every aspect of the server, I enjoy configuring stuff, enable or disable features, and lots of testing.
My domain name is pointing to my home server. I created sub-domains for my Website and blog (Wordpress), forums (phpBB3 and phpBB2), etc., and I try to keep them organized using Apache virtual hosts, running them separately in different directories.
I'm kind of obsessed with internet software, specially open source ones. I love to install mods, test compatibility between them, lots of experimenting. The cool part is that I make all my edits directly and I don't have to upload anything.
Since I'm a musician I've been experimenting with radio and video streaming applications as well, such as SHOUTcast and IceCast, serving some music for a few listeners, not always live since my connection isn't great (756 max upstream). All of this under Windows XP... but, it performs great serving music for all the rest of computers in he office. Different playlists with many genres of music, all day (multiple Winamp versions running at the same time). Of course, all the music is located in a separate HDD.
The hardware isn't that great either (HP Compaq dx400 Microtower = Pentium Dual Core E5300 @2.60 GHz, 3.24 GB RAM) but it's OK for now since I'm not famous xD = not many visitors