As a university teacher myself, my credo is that i do not teach, i help my students learn. One of the key components of learning, as opposed to acquiring facts, is the ability to push the borders of the known and seek out something new. So I always encourage my students to explore what is new even it is in something as traditional as -- say RDBMS.
In this context it is important that the teacher walk the talk and prove to the students that he or she is also pushing the borders ... and yes I do try to use whatever technology I have access or can afford .. and this includes stuff like Wiki, Blogs, social networks, YouTube, Print-On-Demand. Some of these have proved to be successful and some have failed. We rejoice when things work out but we do not regret our failures.
Unfortunately many of my colleagues see all this is a waste of time.