In his recent post, Eliot Miranda has announced that Teleplace Cog VMs are now available. The excerpt from the original announcement follows:

The Cog VMs are Squeak/Croquet VMs that run closure Squeak/Croquet/Pharo/Cuis images. This release contains two distinct VMs, the StackInterpreter and the Cogit. The StackInterpreter is a fully-portable plug-in replacement for the current closure Squeak VMs and images. The Stack VM uses context-to-stack mapping and a somewhat improved garbage collector to achieve modest but useful performance gains in the 10% to 15% range. The StackInterpreter is intended to supersede the Squeak VM on platforms where the Cogit cannot be used. The Cogit extends the StackInterpreter with a just-in-time compiler that uses aggressive inline caching techniques to deliver substantial performance gains in the 3x to 15x range, depending on benchmark.

For more information look at the original post