After upgrading to linux 2.2 and using all redhat kernel update rpms on redhat 5.2, you still cant smbmount a smb server. Smbmount will not ask you for a password or take a password command line thus breaking important functionality.
this should be fixed in samba-2.0.2-0.*.rpm. The command line arguments for smbmount have changed, IIRC.