mount_smbfs(1M), smbfs(7FS), and friends have not been backported
to Solaris 10.
You'll need to upgrade to Indiana or use third party software.
<URL:http://hub.opensolaris.org/bin/view/Main/downloads>
<URL:http://www.obdev.at/products/sharity/>
Happy hacking,
John
groe...@acm.org