Currently, there is no way to set a limit on registrations besides date restrictions. However, when registration is full, you can manually close the registration type. I've created a Bugzilla entry (http://pkp.sfu.ca/bugzilla/show_bug.cgi?id=2909
) for this feature so that we can consider it for inclusion in the next release.
Public Knowledge Project Team
Don't miss the First International PKP Scholarly Publishing Conference
July 11 - 13, 2007, Vancouver, BC, Canada