I started a blog with my poetry club at school. Check out The Wednesday Afternoon Poetry Club. The club consists of twelve girls in grades 9 and 10, and we meet twice a month as part of the school day. I thought the blog would be a way for us to get a lot more out of the group, and create an online writing community. In the three days we've been at it, they've already posted 15 poems, and commented on all of them, so I think it's working! I used the NWP e-anthology's bless-press-address format for soliciting comments, and that's working well, too.
It sure would be awesome if some other teacher started an online writing group at a different school...then students could visit each other's blog and share feedback...