My Mom (now retired) was a librarian. She taught me early on that if I thought there should be a book about some topic, there probably was. She was right, of course. These days I tell people if they think there should be a website or mashup about some topic there probably is, though it might harder to find than books in the library. Now we are getting to the point where we can almost say "if you think there should be a spatial data set on a topic, there probably is."

This was driven home to me today when I read this press release about a free website and for-fee downloads for sat navs of points of interest for celiacs (folks intolerant to gluten). You can download for $5 or $10 per state locations of bakeries, groceries, restaurants and the like that cater to celiacs.

As I don't have a satnav I've not researched this, but is there a clearinghouse for such offerings? That is, does someone offer an index to all the POI layers downloadable for satnavs, perhaps by brand? The one noted about is "CSV formatted as points-of-interest (POI) for your Garmin or Navman."