Hello people,
with some help from Bryce, I've built the VM with Exupery plugin on Solaris 10/x86 and created a package. You can get it from http://ftp.squeak.org/Exupery/vms/exupery-vm-0.09-solaris.pkg and install it with pkgadd.
The VM is based on unix-3.7-7 and contains everything except AsynchFilePlugin (which won't work on Solaris), MiscPrimitivePlugin (which won't build), and all the plugins not available on unix platforms, of course.
It's also built without iconv support, as squeak depends on gnu iconv behaviour ("MACINTOSH" table doesn't exist, "MAC" table, given as alternative, won't cooperate with utf-8, so is useless, too).
Also note that the package is built on Solaris 10u2 (06/06), so it might, or might not work on older releases.
The VM passed all but a few tests in Exupery's test suite, some of which are known-broken.
You still have to get yourself an image and the smalltalk part of Exupery to try it.
Have Fun, Patrick Mauritz