Attached Link: My SmugMug gallery

I agree, Smugmug rocks. In addition to making purchasing easy, it's extremely customizable and very flexible. I have Comcast cable, and I don't find it slow at all. It's not inexpensive, but there is no storage size limit. If you were willing to spend the time, you could upload everything to there and use it as a backup. ;-)

I have both photographs and fractals there. It is organized into categories and galleries, which makes finding things easy and intuitive. I can't comment about Zenfolio, since I've never been there.

Dennis