Forums / Cotonti / Extensions / [Release] Events and Calendar v2.0

http://www.cotonti.com/downloads/plugins/news-events/calendar-plugin-forcotonti
Using pages for events seems more logical than a separate table since you got everything needed there (three date fields is more than enough). Plus you get all page-related benefits (search, comments, ratings, tags etc). "I'll be there" capability (if needed) can be provided by extrafields and (maybe) a small linking plugin.