Firstly, some observations about recurring themes thus far in the 2008 season, and some speculation about the season arc.
http://community.livejournal.com/doctorwho/3115115.html
Secondly, an observation about the main non-regular character in the recent two-parter "Silence in the Library" / "Forest of the Dead", and some speculation about the Doctor's behaviour in the future.
http://community.livejournal.com/doctorwho/3118723.html