Now that the RSS feed of Paris concerts is working again, I've started adding the most interesting to upcoming.org.
I created a new, more accurate metro: Île-de-France > Paris - there anyone can read the list of events, join the metro, add their own events and subscribe to RSS feeds or iCal calendars of upcoming events.
See also the vodkacoca collective, who do event listings and recommendations in their own, extremely useful, way, including links to band homepages and MP3s.