Free Technology for Teachers is the name of a blog written by Richard Byrne. The blog is very interesting and provides lots of useful information about how to teach using new technologies. As the author states: "free resources and lesson plans for teaching with technology."
I particularly like the tutorials on how to get the best out of different online resources such as google docs or how to start an online teaching project using free tools available online. It is not strictly a blog for language teachers but it can be a great resource for everyone involved in a bilingual program, especially to build an online learning environment that can be used to do projects with other schools.
The writer twits all the new information regularly so it is very easy to keep updated.