Novell delivers Open XML translator for OpenOffice
Not that there are many documents to read with it yet as I understand given that a number of organisations are taking Gartner Groups advice to delay deployment of Office 2007. Article is here.
Alternatively you could check out this item, also from Computerworld. I'll leave you to decide the humour level for yourselves but it does at least have native ODF support (and yes, Computerworld articles *are* delivered via Lotus Notes...).