Peter Dunphy wrote an interesting post last week about the limitations of Political Compass.
Of course, in the blogosphere there is very little new under the virtual sun, and this was a topic of debate 5 years ago. The late and much missed Chris Lightfoot was a great critic of the application and wrote his own version, along with this explanation. Entirely open source, it is ripe for someone to adapt and inflict on Facebook. Having said that, I’m not sure Chris would have approved of this in light of Facebook’s somewhat lax attitude towards user privacy – I do miss his postings.