According to researchers at Fortinet, the worm's creators are wrapping Google's RSS reader around fake video downloads as part of a strategy to strengthen the social engineering component of the attack. From Fortinet's advisory:
[ SEE: Web worms squirm through Facebook, MySpace ]
Fortinet researcher Guillaume Lovet believes the cyber-criminals behind the Facebook worms registered Google Reader accounts (either manually, or automatically via phishing operations or automated CAPTCHA solvers) for the sole purpose of loading them with links to malicious sites.
Fake video lures are used to infect Windows machines with rogue security software.
Image source: Jacob Botter's Flickr photostream (Creative Commons 2.0)