Another gem from PubSub. Selena has recently begun a blog on her learnings about elearning, with several very good posts.
As Selena points out many of the technologies needed to achieve mLearning are available today, but they need integration into a seamless framework that will be easy for both the learner and the teacher to participate. The same goes for ePortfoilios and there usage within a learning framework. The work by people such as Brian Lamb and his friends using MT is a great start.