Let's think a little more strategic for a few seconds :
The killer app is still Office (Or Isn't it the Web ... pick your favorite... honestly, my Killer thing is Wikipedia... whaetever). One of the biggest reason for people to stay on Windows is that they feel that they can't live without MS Office (whitch they more than often obtained illegally ;) ).
Having a good replacement for Office could be a huge step into getting more people to, lets say, Ubuntu and other "Free made easy" ouvertures and thus getting more potential contributors. Oh wait there IS such a replacement !!!
I think that contribution to OpenOffice.org, right now, is a pretty strategic investment (yep, it's the right word) as it's devellopement would facilitate integration of many more people by diminishing one of the last "chains" they have to ... hum, let's call this the dark side ! More people = more support (money, time, code, advices, feedback...).
Have fun and, whatever this discussion leads to... DO CONTRIBUTE !!!
FranÃois