Point your bazaar client to

$ bzr branch http://bzr.figuiere.net/ooo-thumbnailer/main ooo-thumbnailer

There is a ooo-thumbnailer that will extract thumbnails from OpenOffice.org files. The thumbnailer work (with some bugs I'll fix to refine the thumbnail), I'm not sure the install works fine for now. It is written in C and GPL. It was inspired by a hack in Python I found on the interweb ;-)

Patches welcome, as usual.