Well, your probably well aware of the Open Office port for AmigaOS. This would have to be one of those worth while projects you talk about! Have you meet the people working on this? They seem to be working closely with Hyperion?
The only thing we(the AmigaOffice-team) got from Hyperion sofar are the
sources for an unfinished GTK-port which turned out to be useless as
OOffice doesn't use GTK at all (slight missunderstanding on our side).
AmigaOffice won't be a specific OS4 app, and is planned for OS4/MOS/
Amithlon plus maybe AROS. And it won't be finished anytime soon :-x