Dear Jason,
I was using the PropertyFactory.createProperties(TcPr tcPr) to convert Word's table cell properties to CSS, and noticed that this does not pick up the cell's width.
So I've added my own conversion class which does this, handles percentage and pixel/dxa widths. Not complete though, I don't know how this works with XslFO !!!
There is one question: in my experiences the dxa width was somehow correct if I was dividing the dxa value by ...