I use shutterfly and love it. It is easy to use and edit. Plus I like that it emails parents when you update it.
As for what I have on my site that I would recommend it would have to be my spelling list for the year. I typed it up in a word document and added it to the site for parents to be able to download and/or print. I have had SOO many parents tell me how much they appriciated that. (as a parent myself I wish that my daughters' teachers would do it too.) I also include vocabulary word for reading and study guides/powerpoints for science and social studies. I don't update it often, so the things I have on there are things that can be used from year to year. It takes some time in the beginning to get set up, but is worth it later. I hope this helps! My site is
www.mrscox4thgrade.shutterfly.c om