Oh the things fellow programmers do for their fellow programmers!
if u r not reluctance, can i see ur code?
Corona Labs has a sample app we call the Business App Sample. One of the screens shows how to use a mapView to plot locations of various locations. The sample uses fixed data, but you could use the above Yelp library or make your own calls to Google to get a list of facilities that you’re interested in.
Once you have the table of data from the server, it should be pretty easy to follow the code in the Business App Sample to plot your locations.
See: https://github.com/coronalabs/business-app-sample
Rob