You can also map your images on Flickr, have a look see
here
Flickr does provide a free service but it is quite limited with only three 'sets' available and limited uploads. It cost me approx £25 for a two year 'subscription' which now includes unlimited sets and unlimited uploads (though they have put a 10Gb limit on individual images

)
I have not really looked at smugmug, but the thing i liked abut flickr is the ability to classify and tag the images and then add then to particular groups of which there are numerous.
The tags facility is great, for instance when I went to Anstruther in early December I had already looked at where would be good places to take pictures via the tag and map facility it offered