I use Ron Minnich's distribution from http://code.google.com/r/rminnich-9go/
It compiles fine on native plan9-386. I had to do some minor changes, however. Get this tarball, unpack and cpdir -m to $GOROOT
It is somewhat outdated compared to Lucio's version (this is 60.2)
Just do:
## Go language install
cd
hg clone https://code.google.com/p/rminnich-9go go
bind -ac . /
cd /go
rc /go/src/9setup
cd 9/prebuilt
rc install
cd /go/src
mk install
###
Hope this helps.
++pac