Entrust OID registry?

The document http://www.imc.org/ietf-smime/oids.html (Note to Paul: it is
not referenced from the ietf-smime page) contains the following
Algorithm Identifiers:

    cast3CBC OBJECT IDENTIFIER ::=
        {1 2 840 113533 7 66 3}
    cast5CBC OBJECT IDENTIFIER ::=
        {1 2 840 113533 7 66 10}


Whereas the OID registry at http://domen.uninett.no/~hta/ietf/oid/1.2.840.html
contains registrations for "1.2.840.113553 - Nortel US", under which appears
"1.2.840.113553.7.66 - Secure Networks Algorithms".

Neither www.nortel.com nor www.entrust.com seem to have an OID registry
which could verify which of these entries has the typo.  So,

  1) Anyone know where to get the list of organizations under 1.2.840?

  2) Anyone know which is the correct OID for Nortel/Entrust?

  3) Anyone know if Entrust has published the OID's under it's control
       including the AlgorithmIdentifier parameter syntax for CAST5 ?