I've written a more detailed timeline here: <a href="http://blog.trejdify.com/2014/03/tesla-motors-history-timeline.html" rel="nofollow">http://blog.trejdify.com/2014/03/tesla-motors-history-timeli...</a>
It's already out of date, doesn't cover recent announcements of the driver assist capability and only speculates about the all-wheel D option.