It would be nice to have a feature where you could call a script post creating a user or group which could do things like....
create default junk filter rules via sxaa
send a welcome message to the new users inbox
perhaps create a samba account
or anything else you choose .....
There should be an area in sac where you can define a post script which then can optionally be run via the create user wizard as a check box or something similar.
The plugin architecture is already there, and thats probably best for this, but it would be nice to automate it at user creation.