This Google calendar contains (hopefully) all TYPO3 events ;-)
If you have any events to include there - just drop me a note at patrick.lobacher@typovision.de
Format: XML / ICS / HTML Embed calendar: <iframe src="http://www.google.com/calendar/embed?height=600&wkst=2&bgcolor=%23FFFFFF&src=g31fidsojme226ci6nak3mvu78%40group.calendar.google.com&color=%238D6F47&ctz=Europe%2FBerlin" style=" border-width:0 " width="800" height="600" frameborder="0" scrolling="no"></iframe>