I think this is a very great topic. GTD (getting things done) and CPA (continuous partial attention) are 2 very interesting issues in today’s world. Please invite David Allen.
BTW:
For all Gmail users there is a nice GTD plug-in at http://www.gtdgmail.com/
Also for those who would like to see on what they spend/waste time while working on a computer try: http://www.timesprite.com/