This has been added in MCD6 for outgoing calls.
Alpha tagging is extended to associate the name string with dialed digits for outgoing calls.
Not sure about incoming, I know in Australia we don't get name on incoming calls provided by the carrier, we use Alpha Tagging and the Telephone Directory in the 3300.
From what I read on forums it sounds like other countries are provided with names as well, could be wrong though.
Anyone feel free to elaborate on their country.