I may have the opportunity to teach/TA a 1-unit exploration course at UCLA - the professor and I think Web 2.0 is a good topic to explore but I'm trying to find out what topics/case studies would be good to spark the imagination and future learning. I'm planning on calling in my friend who runs his own FML-type venture, if there's anyone in the LA area who would be willing to come by, drop me a line.
REST and Javascript, at least a high level, they are the backbone. Also Amazon is a great case study of rethinking business as services. This eventually led to EC2 and S3.