This is off-topic but I thought Nisus users might be interested.
There's a new open source (free of charge) word processor out called Bean.
http://www.bean-osx.com/Bean.html
Like Nisus Express, it concentrates on simplicity, although it's several order of magnitude simpler than Nisus. It's a lot like word processors of old, back in the late 80s.
At the moment it doesn't display fonts very well, which put me off using it, but it's still in beta testing stage.
Still, might be worth checking out. Good word processors on OS X are rare as hen's teeth, and this one looks set to be up there with Nisus one day.