You want it… you’ve got it thanks to Clark Dastardly for these links.
Solaris Nevada/OpenSolaris -
https://solaris-sl-viewer.s3.amazonaws.com/SecondLife_i686_1_20_17_0-2008Oct07-snv.pkg.bz2
Solaris 10 -
https://solaris-sl-viewer.s3.amazonaws.com/SecondLife_i686_1_20_17_0-2008Oct07-s10.pkg.bz2
Download, extract and use
pkgadd -d FILENAME to extract. Remember to do SU so you are logged in as ROOT.
Then Navigate to opt\secondlife\bin
and run
./secondlife
You may need to adjust your graphics settings, also turn OFF avatar imposters if you get a black box.