When I primarily used SuSE Linux for my desktop, as long as I had a truetype font server set up correctly, I was very happy using OpenOffice.org. (Strangely, OOo runs really well on Windows - go figure.)
Now that I have almost completely converted my business over to using Macs with OS X, I have found myself grudgingly using Word for the Mac (which is quite good). OOo under X11 on the Mac is usable, but far from perfect. I think that the people working on the NeoOfficeJ project (OOo running natively on OS X using Aqua) are doing a great job (I donated money at their site today - in my own interest to encourage people whose work I use!) and I find NeoOfficeJ to be very usable and getting better. In the future, NeoOfficeJ is likely to be my standard writing tool.
I gave AbiWord another look tonight - they have a minor version release since my last look. I liked what I saw:
- AbiWord file format is clear and easy to parse XML
- Light weight - loads in a few seconds even on my old iBook
- Handles imported graphics well - I just save OmniGraffle drawings as TIFF first
- Seems to generate tables of contents well (but no index building features - needed for very long documents)