[R] R software to place points on Yahoo maps

[Gabor Grothendieck]

Is there any R software that create an image from Yahoo maps together
with points of known UTM coordinates (or lat/long marked?  Note that
my region of interest is not covered in sufficient detail by Google maps.
It actually does not have to be Yahoo maps as long as it has sufficient
coverage of my region but that's the one I have found with coverage of
my region.  The scale I am interested in is a city block.

Thanks.