I'm not 100% sure, if this is new – but the event details screen in Google Calendar now includes an embedded Google Map showing the location of the event.

I noticed this a couple of months ago and thought it was new too but doubted myself, so perhaps it was new back then...

It was added in november

http://groups.google.com/group/google-calendar-help-updates/browse_thread/thread/83165fb628ee34a8/adead28582a5183c?lnk=gst&q=maps#adead28582a5183c