I applied to sell my photos there over a year ago and was rejected. They have some funny requirements, if I remember correctly. If not, someone please correct me. I believe you had to resize your initial test batch to make them much smaller for review. They're pretty strict, as far as I can tell, and they do have some nice photos. Their web site has not changed since I first visited them.
If any of you submit to ShutterPoint, from their (KeenImages') web site: "ShutterPoint is operated by the same company that manages KeenImages website."