> nope, not yet.  currently, the best place to hook into this is
probably
> to customize the 'logged_in.cpy' script that's in the 'plone_login'
> skin.  ideally, this should be changed in the Plone core to fire an
> event that others can subscribe to, but that's not in place yet.

Hopefully this should be in place in some form in Plone 3.0

Ben