I was wondering about this yesterday. Granted, it would not be as good as the other ones currently in operation (less ability to aim, glare from the ISS, etc.), but it seems like it would be a relatively easy add-on (the platform, launch vehicles, and maintenance crew are already in place) to take advantage of atmospheric-less viewing (providing the ISS project could squeeze in the time & resources). I googled and found this today...http://www.issat.org/ ...which is a group planning to do just that. What do y'all think?