Whoa! An article and a link to the post, by a gentleman who determined that over half a MILLION networks (no idea how many computers connected to each network) have phoned home to Sony and First 4 Internet. The study was based on DNS server caching analysis. I haven't read the details of the analysis (UPDATE: I've read the article, and have pictures! See below). But, I thought the first guesstimate of the scope of the infection was interesting.
I was directed here by Todd at GeekNewsCentral, who estimated that it cost him $500 bucks to reinstall his wife's computer, and was gonna bill Sony! I say good on ya, Todd. Lets turn this into a cost to admin the various spyware/rootkit/trojan/virus melee(s).
OffTopic: Gizmodo Unpacking The Xbox 360.