Keep your class motivated with this is behaviour management tool where teachers can award virtual badges for anything. Choose from a large collection of badge designs. The children can see their progress with their own personal login.
http://ictmagic.wikispaces.com/Classroom+Management+%26+Rewards
ClassBadges is a free, online tool where teachers can award badges for student accomplishments. Through your teacher account, you can award badges customized for your classroom or school.
Gamifying blogging. Floats some students' boats. Extrinsic motivation, can it become internal? I think some of my kids a few years ago really got into the number of edits/editing status as top editor on the wiki, then moved on to just being productive for its own sake.
BUT, I bet there are other badges that you could come up with that would be more meaningful (Questioner, Connector, Etc.) AND they could be bestowed by the kids on each other.