Dear all,
Forgive the off-topic email :)
Self is the canonical prototype based language within the Smalltalk family. It is open source under a BSD-like licence and includes a fast VM and a development environment built on the original morphic GUI that Squeak's morphic is a descendent of. Self is currently available for Sparc Solaris and MacOS X.
Although Self has been resting for a while (if not pining for the fjords), there is a new release with a Linux VM in the works and as a precurser to that there is a new website:
Please check it and Self out - and please refer to this site in future when blogging etc so that it is easier to find Self material online.
Best,
Russell