Update (via Bill): Official word from Google Lat/Lon Blog.
From Search Engine Land:
Yesterday Google told us that users will now be able to edit any of the details about a business or location or add new businesses even if they’re not the business owner. The capability doesn’t appear to be live yet however.
Greg Sterling asked about malicious intent (you have to register, so Google will know if you did something bad, ideally) and changes to search results. He also notes, with no supporting figures: “Google has had enormous success, for example, with its My Maps product on a global basis since it was introduced in April, 2007.” I’m curious about that since I’ve not heard anything from anyone on its usage.