A number of programs which broke the iTunes DRM have received similar takedown notices. I'm not aware of any attempts to contest the takedowns, which is probably because they were completely justified. :)

My understanding, based on what I saw of the relevant pages before they got taken down, is that BluWiki got a takedown because their users were (possibly inadvertently?) attempting to reverse-engineer an encrypted metadata database on the iPod which used the exact same format as the FairPlay key database on the computer.