Scammers are preying on Facebook users' yearning for a "dislike" button, and the lure of deals on Apple products.
Links appearing to be from Facebook friends offer to install a "dislike" button. Instead it tricks you for access to your account allowing them to spam your friends with your name.
There is no Facebook dislike button nor is there likely to ever be one. It should go without saying, but Facebook users should be weary of any application asking for account access.
TUAW.com reports a phishing scam is spoofing Apple Store email linking to sites that resemble their online store. They mention ways to spot the fake which would be obvious to most users, but perhaps not all. Pretty much any site with broken english might be one to avoid ordering from.