A brief exploration of Twitter suggests there is an awful lot of rubbish on it. One would need to explore further to work out how to find any useful information. I searched under Kevin Rudd and Brendan Fevola and found a lot of opinions but not what I would call particularly useful or reliable information.

Probably a sign of my generation, but I am not interested in placing myself on Facebook - I think there are real privacy issues, not to mention concerns about relying on online social interaction rather than the real thing. Still, it seems to be the way of things for people under 35 so provided it is used responsibly, good luck to them.