Acrobat has the feature to remove XMP, and you have to remove nodes one by one, with my Batch XMP Remover, you can remove all XMP data of the PDF files from the given folder with the help of Acrobat API.
I will release this product recently.
P.S.

Adobe’s Extensible Metadata Platform (XMP) is a labeling technology that [...]

Adobe Acrobat Professional 9 has released for a long time, and I have test the trail version, recently, some customer ask for the updated version of Batch ReaderEnable for Adobe Acrobat Professional 9, so it is here.
want to know about Batch ReaderEnable, please visit here

Adobe Acrobat 9 Pro Extended and Adobe Acrobat 9 Pro are out, you can download it now.

Adobe Acrobat 9 Pro Extended is the complete PDF solution for business and technical professionals. It includes all the features and functionality of Acrobat 9 Pro, plus the ability to unify the widest range of content in a PDF [...]