Spanish class blog

As Spanish teacher, I want my students to communicate in Spanish.  A blog is another venue for communication.  Perfect!  I could assign blog posts about a movie or story that we are watching/reading in class, about what students did yesterday/last weekend (past tense), or what they hope others will do (subjunctive).  That would be fun for me to see and I think the students would be empowered to use their language skills in a new, modern venue.