Do you have a window? / FT.com, May 23 2008
http://www.ft.com/cms/s/0/5765051a-2877-11dd-8f1e-000077b07658.html
"If you spend too much time playing telephone tag or e-mail ping-pong when setting up meetings with colleagues or contacts, it may be time to look at a new kind of browser-based software service that is designed to help schedule meetings.
Studies suggest that most business meetings are with people from outside the organiser's company, and that setting up a meeting with an external contact typically takes seven or more e-mail exchanges as people bandy dates about."