I finally have a chance to have my own classes - at least for a term! I will be doing a term block in high school English which I am really looking forward to, and hope to be able to incorporate using Wikis with at least some of my classes. When I determine whether the school is happy to allow me to use these I will share my experiences here and hopefully be able to make the site public.
I have tried to find a blogging service which is not blocked by filters, but have so far been unsuccessful. I think blogs would be ideal in the English classroom, but will have to follow up whether this will be possible.