I have not bothered to create a new package, but there is a new binary available for OS X:
hget -o 9vx.OSX.gz http://pdos.csail.mit.edu/~rsc/9vx.OSX.gz
gunzip 9vx.OSX.gz
chmod +x 9vx.OSX
./9vx.OSX -r your-root
Please try it on 10.5 and see how it works.
Sources are not packaged up until things
are stable for a little while, but they are in
the Mercurial repository at
hg clone http://hg.pdos.csail.mit.edu/hg/vx32
Russ
