Here are two blogs that can be interesting for people wanting to know more about economic geography and regional development. The first is by Richard Florida, who is now a regular contributor to the magazine The Atlantic. I must say that I am not a big fan of Florida's creative class thesis, but this blog talks about much more than that and provides a lot of interesting information.
The second is a collective blog linked with the website of the NY Times, that includes contributions by Edward Glaeser, an economics professor at Harvard who does work on Economic Geography.
As you will probably notice these are blogs based in the USA. I have tried to find similar ones based in Europe, but I haven't been able to. If you know of any please contact me.