Podcasts in the Classroom

I was wanting to brainstorm uses of Podcast such as Grammar Girl in the classroom. I'm looking for assignment ideas, anything that would help my students become more engaged!

Just a note: I teach 8th grade Language Arts with a full functioning laptop lab, Promeathean Board (once I figure out how to use it! - all the tips on the Forum were Great!), TurningPoint polling devices, etc. You name it I probably have it or at least access to it.