Hi Kim,
The most commonly overlooked reason that people can't access conference information is the Conference Timeline form, which is available under Conference Management. Make sure that all relevant dates (i.e. website "go live" date) are set on the form.
Regards,
Alec Smecher
Public Knowledge Project Team
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Don't miss the First International PKP Scholarly Publishing Conference
July 11 - 13, 2007, Vancouver, BC, Canada
http://ocs.sfu.ca/pkp2007/