From the website:
"Blogging in Place: Writing That Explores New Neighborhoods"
Date: January 7, 2009
Summary: Teachers with the National Writing Project are combining place-based learning, project learning, and blogging to connect classrooms, provide an authentic audience for student writing, and prompt students to explore the world outside the schoolhouse doors.
Great ideas and great advice!
Also see on the NWP's Technology Initiatives: http://www.nwp.org/cs/public/print/programs/ti
I hope this helps!