Evan Fleischer wrote a cheeky little bit about the reading level of the SOTU over at Esquire: Is the State of the Union Getting Dumber?
It was triggered by this graph in The Guardian:
Even emailed me and several other linguists to get some reactions. He quotes me, Ben Zimmer, and Angus B. Grieve-Smith. We generally agreed that trend noted by the graph probably had more to do with changing trends in who the speech is for, rather than any change in intelligence level.
It's a fun little read.