Lettuce lives on GitHub at : https://github.com/sconemad/lettuce
Lettuce aims to be a networked embedded automation platform that is both lightweight and extensible. Its applications include automation, control and entertainment systems in the home, but is also suitable for use in industry.
The lettuce system was developed between 2006-2010, and is no longer being actively developed. I’ve moved all the documentation, firmware and hardware information to github in the hope that someone might find it useful!