Experiments with the Linksys NSLU2 - the Slug
http://johnarthur.wordpress.com/2008/03/25/a-high-resolution-ip-webcam/
introduced me to the Slug - it explains how to add a HD webcam and provides a ready made firmware
the picture quality is fantastic - and you can run 2 cameras at once.
There is lots of documentation on the Slug here
I managed to build a working OpenWRT Kamikaze tool-chain and can compile c-code
- so I decided I would try to make it control external circuits, run an HD camera and a USB2 external disk on Samba and FTP
There are only a few GPIO ports but there is a working i2c line used for a real time clock chip on the PCB
i2c notes (drivers for common chips that compile for Debian or OpenWrt)
NSLU2 (Slug) driving a PIC microprocessor as an i2c slave to control 2 model servos
Playing MP3 and WAV sound files on Debian Slug
Clone a Debian Slug - copy Slug firmware and USB disk contents to a new system
OpenWrt (mainly) Notes - make a Slug boot up on it's own if the power goes off then on again
Debian Notes- hardware add-ons - Use a USB Flash drive with a swap partition (but set minimal use of swap - and reduce memory use)
add a UVC Webcam - add Motion - add a WIFI dongle - add a USB/rs232 adapter
Debian Notes - cgi PHP etc - Where to put files to make a web server with external device control scripts