I've made rather detailed installation instructions for Koha 2.2.9 on OpenSolaris 2008.05 available at http://www.at-hardeberga.com/Koha-2.2.9-on-OpenSolaris-2008-05-v0.95.odt Please feel free to try it out and give feedback. Next I will give Koha 3 a spin on OpenSolaris 2008.05. Stay tuned.