Here is a couple of websites that I have seen used successfully this year to motivate and encourage students to write.
I think what has been key this year is giving students an authentic audience to write for. When you can put your ideas and thoughts out on the Internet and have other people, sometimes strangers, comment on what you did...the feeling is unbelievable!
Click here for links and details http://sqworl.com/mmwk3r
Thanks to Shelley Friesen for showing me Sqworl, the cool visual bookmarking tool! Let us know if there is anything we can do to help!