These are now available on

For 301

   ftp://ftp.scientificlinux.org/linux/scientific/301/

     samba-3.0.4-6.3E.i386.rpm
     samba-common-3.0.4-6.3E.i386.rpm
     samba-client-3.0.4-6.3E.i386.rpm
     samba-swat-3.0.4-6.3E.i386.rpm

For 302

 for arch in i386 ia64 x86_64

   ftp://ftp.scientificlinux.org/linux/scientific/302/$arch/errata/SL/RPMS/

     samba-3.0.4-6.3E.$arch.rpm
     samba-common-3.0.4-6.3E.$arch.rpm
     samba-client-3.0.4-6.3E.$arch.rpm
     samba-swat-3.0.4-6.3E.$arch.rpm

-Connie Sieh