What is the best way to grant non domain users access to a workspace
site? When users tray and grant a non domain user access by typing in
their email address they receive an error message can't find user. I
guess we have a few options:

1) create domain users for each external user

2) create local users on the SPS 2003 server

Is there a way to enable people create their own user id's from a web
page or something?