Well, out there you can find several stripped down linux distros. For our purposes the best suitable choice is the one you can find the dev page at http://moebiuslinux.sourceforge.net . It’s very lightweight, it has ssh enabled by default and it’s decently up to date. Unfortunately it lacks the last raspberry-pi’s tweaks, like the support for 512 mb model b.
I’m planning to brew one by myself in the near future, but in the meantime this distro is a very good starting point. Many thanks to the dev who made this!!!
For your confort I already prepared a .img version of this (on the author’s page you’ll only find a .bin file, only suitable for linux folks). You can grab it here and inin the project’s sourceforge page. Please use Win32diskimager to install it on your SD card. Just make sure your SD Card drive letter is correct, or you will end in wiping your HD content, be aware!
This is the distro where RaspyFi will be built.
Current issues: no 512 mb ram support.
A ready-to-flash RaspyFi build will be ready soon!!!