The module takes "long, lat"?! Well, I wouldn't call you the idiot. ;)

A Google fight shows:

• "lat long": 5.6 million hits
• "long lat": 0.36 million hits

And the first page of hits for "long lat" all have titles that include "latitude longitude" in that order.

On such an interface, I'd probably require the tagging of the passed-in data with 'N' and 'E' to help avoid reversing the two numbers or getting a sign wrong.