So here's my home setup, whats yours?
My Laptop - Ubuntu 7.10
My Desktop - Ubuntu 7.10
Raid Storage - Ubuntu 6.06 Raid 5 in hall cupboard.
Television - Mythtv on freeview DVB-S (with projector), with videos mounted off the RAID, EPG comes in over the air (no unreliable internet XMLTV feeds).
Security - Ubuntu 7.10 on a PC in the attic running "Motion", 3 cameras, taking jpegs of movement outside the house. Also running lighthttpd and natted from my router so I can see the pictures from an XHTML page on cellphone (dydns).
Music - MPD running on the security machine with audio out to the home theater and office stereo, MPD allows me to control the playlist from any device, I have clients running on XP, Linux and Java (from the cellphone over bluetooth), so at a party I can "next track" from the cellphone !
Also have an old modem plugged into the raid box (because it was closest to the phone line), and a python script that looks for "RING" on the serial port and sends MPD a PAUSE command, this means that when the phone rings the music stops, very handy !
Windows 2000 Development server - MSSQL & ASP.NET.
Photoframe - Old toshiba laptop (CDS320? - 64mb ram, running damn small linux, with a PCMCIA network card), running a script to wget images from the development machine intranet site, the development machine gets them from the raid box photos directory - where we put all our digital camera shots (ASP.NET program), the .net program selects newer images more often than older ones, so the photoframe simply wgets the same URL every 3 minutes and a new picture is displayed.
Backups - An old machine with 2 drives running FreeNAS, located in our (detatched) garage, getting rsync'd with the raid array each night on a cron job.
Lounge laptop - Ubuntu 6.06 - very old machine, good for googling in front of the TV.
Wireless - WRT54g running openwrt linux and also WDS to share the signal with the mohter-in-law (5 houses away)
mother in law running ubuntu 7.04 (on a nice new toshiba laptop), old laptop photoframe (as above but rsync'd off her laptop) and also xnet (plugged into ger WRT54g), she has no telecom line at all. (we can also ssh into her photoframe and add pics of the grandchild !)
Wife's computer XP - needed for her Visual Studio work and also canon multifunction on USB.
Temperature - Outside and inside monitored by two DS18S20 one wire serial temperature sensors, connected to the serial port of the security machine, the outside one monitored by a cron job to send my wife an SMS via clickatell if the garden gets near frost temperatures. (so she can wake up and put her frost cloth over the plants).
Asterisk - Now in mothballs as i-talk was crap....
Homemade GSM > PSTN interface on bestmate using an old carkit with the mute relay to engage the line and two impedance matching transformers.
I'm sure I've missed something, should probably buy a grunty box and virtualise all this (none of the main PC's above are more than a P3 / 256 ram).