Raspberry Pi uses and set ups!

I've been using raspBMC for airplay music streaming from my iphone in my room.

Did have it in the car which was cool but I don't think the power supply was consistent enough as it was a bit dodgy.
May get round to putting a proper PSU in sometime but they cost more than the pi itself so we'll have to see

EDIT: Oh and I'll post pics when I get home

Got a case and wifi dongle for mine this weekend, installed Raspmc and connected it to a telly in our kitchen as haven't got round to putting an aerial socket there yet.
Works surprisingly well and can watch FreeView via TVcatchup and the terrestrial channel’s catchup services. Haven't got my head round how to tag my iTunes media for xbmc yet though.
Apart from the Pi I think I spent £5 on the case, £8 on the dongle and £7 on an SD card and use the free XBMC remote on my iPhone. I also needed an old USB keyboard for initial setup
If I'm honest though, I think I'd prefer an Apple TV there eventually but at the moment I have a perfectly usable and arguably more powerful device for around half the price.

Using mine currently just to trigger a row of LEDs via Python, got a pretty basic prototyping board set up with LEDs and 330r's on.

going to make a 3x3x3 LED Cube so make some cool light patterns on

As soon as the raspberry pi/android builds of xbmc support HD audio bitstreaming/multichannel audio ill jump ship.

Looking at using one to build a DIY aquarium controller

I plan on building a home automation system around a Raspberry Pi. I'll probably start out using Misterhouse and then write my own software in Python. It'll be INSTEON based using their USB interface adapter.