It looks like there are some OpenOffice conversions to DocBook. Here's a couple found by Google: http://www.indesko.com/telechargements/ooo2dbk, http://www.chez.com/ebellot/ooo2sdbk/
Hope this helps. Mark Fletcher Information Architect 925.951.9053 (Direct) mark.fletcher at workday.com <http://www.workday.com/landing/signature.php>
