Philippe recommended the Eventbrite service to create a functional registration page for the conference, which accepts payments, has an integrated Google map, and several syndication/promotional tools as well.
Philippe also has some good suggestions for how you can help promote the event:
By email - either write an email yourself and insert the event-page URL ( http://iaoc2008.eventbrite.com) or use the "mail a friend" function on the page itself. (Do not spam)
By adding it to del.icio.us, reddit and Facebook to promote it further. You can also find the story on Digg.
Or use the banners/buttons below on your own website/blog:
Don Dunnington
IAOC President