gobeProductive will be released under the GPL soon. It's very cool software. Why adopt in when we already have KWord, AbiWord, and OpenOffice? For one, it has the experience of the GoBe team behind it. These are the same guys who did ClarisWorks. I haven't seen the code, but it's likely to be a lot more elegant than its competitors.
I know the GoBe folks, especially Bruce Q. Hammond, because I did some Libart work for them. The graphics tool alone will be a significant contribution to free software, especially for less technical users.
The software is based on a "parts" architecture. This should make it relatively easy to get started. A good project would be to do Python bindings for the parts API, so people can do simple parts in Python.
The Gobe people have done some really great work. It's a damn shame the business side didn't work out. Instead of trying to hoard intellectual property into uselessness, they're giving their source to the public. The free software community should adopt them warmly.