Google responded via the comment section to the Microsoft Hijacking:
(cross-posted to Danny Sullivan at http://searchengineland.com/google-local-business-hijacking-microsoft-acquires-yahoo-becomes-escort-service-15313.php)
We appreciate your continued efforts to help us identify spam on Google Maps. The wiki nature of Google Maps expands upon Google’s steadfast commitment to open community. That said, we also work very hard internally to identify behavior that doesn’t benefit the community and to take the appropriate actions. We look forward to more and more users getting involved to help us keep Google Maps fresh and accurate.
As you know, mapspam is a difficult problem to tackle – in many ways, more difficult than webspam. Some of these scams go far beyond maps [see this ABC News Story on Locksmith scams]. We take mapspam very seriously and we are working on it, in consultation with our webspam team. While some of the changes we’ve made so far have been less visible, we’re confident that we’re on the right path to effectively reducing mapspam. We think you’ve already recognized that there isn’t an overnight fix.
Please keep the feedback coming, including the direct reports of spam on Maps.
The Google Team