So I joined Facebook this week - not because I had a deep and burning desire to do so, but because we've created a youdecide2007 Facebook group as part of the support network for our youdecide2007.org citizen journalism Website for the upcoming Australian federal election. Since joining, I've received a good dozen of friends requests from friends and colleagues; people have left messages on my wall; I've been invited to events - all of which are pretty regular occurrences on the site, I guess. (The same keeps happening with my LinkedIn account, which I haven't even logged on to …