I will have to point Shari (tizjezzme) to this question of yours. She uploads to smugmug under this name as well as to Webshots - the latter does not sell though as far as I know.

My experience is that smugmug loads extremely slow, but then it could be our South African (crappy) links also contributing. It is much slower than Renderosity, if that helps.

I will send her this link...

Piet Vermeulen, South Africa