Sorry SRS, I didn't really read your question properly... There was another thread here recently and the general feeling was that overall Open Office does a pretty good job of importing the likes of Word docs. I can't say I've much experience there - I rarely write anything that in the longer term I think worthy of keeping.

My biggest move away from some sort of MS tie (needing IIS or perhaps alternatively Sun/Chillieoft) was a different type of thing altogether and while I did use a "translator" to help me a little, involved a lot of hand editing. End result is here and I can now run entirely on free open source programs. I'm happy but that sort of change is not something I'd want to undertake every day!