Digital Media in Classrooms: A Conversation

Over the past couple of days, this post on digital media in the public school classroom has turned into a very good conversation. There are only a few people corresponding on it, but even five or six comments, you can see the variety of viewpoints on digital media usage and training. Most interesting is the focus on student performance and teacher accountability.
Where have you faced difficulty in launching digital media strategies in schools? Where have you seen roadblocks, if you are an entrepreneur? We would love to hear from you.