How Would English Language Teachers Use Blogs, Wikis and Delicious With their Students?

I tried to figure out an activity that combines all of these social networking web-sites. Because I think every networking site has a special characteristic that we can't find in the other, so why we don't use them to complete one another, wiki gives us a great characteristic that is, it's so flexible  we can easily edit and add or remove things, it's great in dealing with large classes. Delicious is a bookmarking website, that we can use it to share references and sources where our students can find them easily by using the key words or labels. Finally, blog is a personal site, that any individual can uses it for posting his/her opinion on something or writing about things happening around.

English language teacher can use them in an assignment that asking the students to go to Delicious and find the shared link titled with " English language level test " or " Test your reading skills" , take the test.. then ask them to take a screenshot and share it on their wikis, then ask them to discuss and describe how easy or difficult it was?, when they felt like struggling?, what were the difficulties they've faced?,and have they enjoyed doing it?, all on their own words. Later on she can make a list on wiki and arrange them according to their marks on the test to create a competition atmosphere.