Can I open Windows OpenOffice Files on Mac OS X with Mac MS Office?

No, MS Office on any platform will not support the opendocument format (odt).

Hoverver, there is a port of OpenOffice called NeoOffice for Mac or the new version of OpenOffice, 3.0.0, has a new aqua version of OpenOffice.

You can use OO.o 3.0.0 or NeoOffice to open .odt files on a mac.