This also seems to work on AZW files by the way:
Code:
mobidedrm infile.azw outfile.mobi KindlePID
Amazon.com has got out of the e-book selling business before, leaving its e-book buyers with no way to move e-books to new devices. So it is comforting to know that there is a work around (at least for AWZ books) if they decide that there won't be a Kindle II or that Kindle I e-books are not transferable to Kindle IIs.