Yes, for the R7RS small language. And a very nice one! Alex has been very open and responsive about integrating plan9 related fixes.

I'd like to see a native code compiling Scheme impl on plan9 as well but that can wait until we have some useful code that would benefit from any compilation speed up! Till then Chibi is plenty good!

On Dec 2, 2011, at 9:24 AM, David Leimbach wrote:

I think this is the reference implementation for r7rs as well isn't it?   

On Thu, Dec 1, 2011 at 12:24 PM, Bakul Shah <bakul@bitblocks.com> wrote:
Alex Shinn's Chibi-scheme is a r7rs "small" language
compatible Scheme. It can be used standalone for scripting or
as a library to provide an extension language. Full guide at
http://synthcode.com/scheme/chibi/

Installation:
 hget http://chibi-scheme.googlecode.com/files/chibi-scheme-0.5.1.tgz | \
   gunzip | tar xv
 cd chibi-scheme-0.5.1
 mk install

Its plan9 support needs more work: access to more of plan9
API, mkfile needs work + targets for .a, html docs, more
tests, etc. but the port is eminently usable.