Seen via a post by @jnoller (Jesse Noller of the PSF) on Hacker News. It is the top post there right now.
Topaz is written in Python, using RPython, the tool that PyPy is also written in. They claim it has a fast garbage collector and a JIT. However, it is in an early version now, so not complete.
Some of the developers of other Ruby implementations, such as JRuby and Rubinius, have advised the developers of Topaz.
PyPy itself is also interesting because it is an implementation of Python written in (R)Python, and yet, I've read somewhere that it runs some Python code faster than CPython.
- Vasudev Ram