MPAA Fires Back at AACS Decryption Utility

DMCA takedown notice for BackupHDDVD at SF.net
I just got a message from SourceForge informing me that they were issued a DMCA takedown notice for BackupHDDVD and have complied. I'm pretty sure BackupHDDVD doesn't violate much of anything so any info (NO legal advice) as to what exactly my options are would be much appreciated.
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昨年末にHDDVDの暗号が破られてしまったのは記憶に新しいところであるが、MPAAがDigital Millennium Copyright Actを盾に「逆襲」を開始したらしい。