after build.sh release, you should have in releasedir:
> l releasedir/sparc/
total 794
-r--r--r--  1 root  users  198513 Feb 11 13:37 INSTALL.html
-r--r--r--  1 root  users  159485 Feb 11 13:37 INSTALL.more
-r--r--r--  1 root  users  237168 Feb 11 13:37 INSTALL.ps
-r--r--r--  1 root  users  169008 Feb 11 13:37 INSTALL.txt
drwxr-xr-x  4 root  users     512 Feb 11 12:45 binary
drwxr-xr-x  8 root  users     512 Feb 11 13:45 installation

releasedir is (I think) in /usr/obj/releasedir by default.

To make an iso:

(cd src/etc && \
  /path/to/tools/bin/nbmake-sparc64 iso-image)

You need mkisofs (in pkgsrc/sysutils/cdrecord) installed to make an iso.

It would be cool if build.sh had an iso target.

-- 
        Greg Troxel <gdt@ir.bbn.com>