It seems that somebody has a scam going on where they send you this notice in the mail (USPS mail) asking if you want to get MSJ magazine subscription. Stephen Toub at MSDN Magazine caught wind of this from a reader of MSDN Magazine and has stated this is a scam. OK, if you follow MSDN Magazine you probably already know that MSJ (Microsoft Systems Journal) no longer exists. It is one of the predecessors of MSDN Mag. Anyway, I suggest that if you get a notice in the mail asking you to subscribe to MSJ do not send your money to these people.
Thanks to Stephen and to the all the readers who caught wind of this scam for letting us all know.
It seems ComputerWorld even followed up on this scam with this article.