That's neat. But it's also the first I've heard of it. Do they promote it outside of the business world? I get the impression that they don't think of it as something a CS department or non-profit would use.
It's no surprise that they concentrate on marketing their business software to businesses though. That's who's going to pay for it. A CS department is going to use whatever the school uses and a non-profit is better served by Google Apps (which is discounted heavily for non-profits).
Also, 80beans is using it and they only have a team of 6.