Craigslist, ye of anti-competitive apartment listing policies, is facing a bit of a reckoning this front, with real estate listing revenue down 23.8 percent year over year to $9.9 million in 2012 from $13 million in 2011. The figures come from an AIM Group research report. The decline may explain some of the company’s litigiousness against mapping mashup services like PadMapper and recent decision to roll out its own mapping product. [Source AIM Group]