Law #8 of the 22 Immutable Laws of Marketing is called the law of duality. This means each market finally results in two players, a #1 and a #2 but no number three.
The example of the rental car industry in airports is a good example.
#3 ? Could be anybody
GroupWise trails Exchange and Notes. It is the third horse in a two horse race. So what is the product to do.
The answer is to join a different race.
I expand on this thought in my personal blog at http://gwbliss.blogspot.com
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.