[wp-hackers] Adding Users via plugin

[Pat Cavit]

I'm working on updating my LDAP authentication plugin so that (if you
so choose) it can automatically register users who successfully
authenticate against the LDAP server.  So far, I've had a patch
submitted to me that is more or less a copy of the 'adduser' block in
wp-admin/users.php

My question would be: is there a better way to do this?  I'm looking
into output buffering and faking POST data so that I can include
users.php into my plugin and have it register people via the official
WP codepath but it still seems pretty gross.  Is there any sort of
cleaner interface/method of registering a user inside of a plugin?

Searching the Codex, WP Code, and Google has left me empty-handed so
far.  Thus I turn to you, my fellow WP hackers.