I’ve made two more additions to The Best Places Where Students Can Write For An “Authentic Audience”:
Scribd also seems to me to be a good place to upload a variety of student writing, especially now since they’ve supposedly removed all pornography from the site. They used to have a great text-to-speech feature, but they’ve eliminated it.
Students can leave a comment on a positive news story at Optimist World. The stories are engaging and relatively accessible to Intermediate English Language Learners. Because of the nature of the site, students are less likely to encounter some of the rude, inappropriate, and incoherent comments that are often left at more traditional news sites. You’re supposed to also be able to contribute stories to the site, but it’s not clear to me how that’s done.
Library Thing is similar to Shelfari (which is already on the list), and is another good place for writing book reviews.