I'm not sure if this is even possible or a crazy idea but hey, a crazy idea can lead to good innovation.

Currently, we have wiki but it would be neat for B&M deal posts to have a similar section like the wiki where people can plot where they had success with a particular deal and where they didn't right on the 1st page.

I saw someone do something like that but it was an external link.

http://forums.slickdeals.net/showthread.php?sduid=415655&t=1220009&highlight=lego+walmart

Here's the post with the google maps link that the OP is referring to: http://forums.slickdeals.net/showpost.php?p=17755313&postcount=56

Most of the time, people don't even bother mentioning in the city, or updating a wiki that someone else started. This seems like more work than that. People here are lazy.

Good idea, just seems like an awful lot of work for something that most people would not use.

DSLreports.com has something like this to show what broadband providers work in various areas. Works better on a site like that though, where the data is pretty much static (unlike deals, where it will be different for each thread).