This is on my list of features to add, has been for some time, current,y trying to decide on Google vs Bing. I had settled on Bing but they've imposed limits in the number of map impressions they'll let a site display and they're not allowed to be behind a login.
In the mean time there's a stack of means of finding mines, by map sheet, name, fuzzy name, mineral type etc.
my orders are to sit here and watch the world go by