Using Blogs in the classroom

I've been considering whether or not to use blogs in my Argument and Research course in the spring.  Of the many advantages, I like the fact that students may write more often.  I'm also interested in the various possibilities for research--the students can provide links on their topics, post pictures or videos, even music files that connect to their topics.  I think that the experience of writing a researched argument can become more relevant once they have an actual audience commenting on their work.  I must decide soon, though--Spring quarter is just a few weeks away. . . .