The pfSense 2009 hackaton, which started on Saturday, can be followed live on http://hackaton.pfsens.org. You can also join the chat by using the Java viewer embedded on the page or head over to irc.freenode.net and join #pfsense-hackathon.
For other FreeBSD related events, check my FreeBSD Events & Conferences calendar.
Or you can follow @sullrich on Twitter