(photo credit: Zunia)
Just in case you didn't notice them on the blogroll, there are two interesting demography blogs you should read (leave a comment if you know another one).
There is the Changing Demography blog (by Kenneth W. Gronbach), which is more focused on market demographics. They have an excellent post on The Mysterious Labor Shortage in China.
And there is also the excellent Demography Matters blog (by a group of demographers and other social scientists). They have a lot of good posts to which I often link here.
ps. you might find some usefull Online Databases on the blogroll too.