Hi River,
it's too late to add it for this import. if the import needs to be restarted for some reason, i'll add this, but i hope that won't happen ;-)
May I ask which style you used?
depending on how much disk space the completed import uses, it might be possible to change styles in future by importing a separate copy with the new style, then swapping that with the current database.
The script to do this is placed at https://svn.toolserver.org/svnroot/mazder/planet-import/planet-update
It's not enough to rename the tables, you have to rename all indices, too (see activate_tables and drop_old_tables functions).
however, since we also want to store the API database and rendered tiles, this might not be possible for very long.
I'm happily looking forward on the complete db import. There was recently a discussion on osm-dev on how to generate a complete history dump which includes all changes since 2004 or so: http://lists.openstreetmap.org/pipermail/dev/2009-November/017672.html
Is this of interest for ptolemy?
Peter