<hr /><i>anonymous claiming to be viric added on 2010-11-24 22:22:34:</i><br />
Maybe this could be implemented as a special link next to a commit that creates (or points to if created) a related Event with some predefined title/text?

Then, as commits have checkins related, checkins could have 'events' related, or events have checkins related.

(It's just a dump of what came up to my mind)