Google is a giant with a gigantic share of porn spammers using their resources.
They are rampant at Google Groups and Blogspot, I see Alex Eckelberry wrote yesterday on the Explosion of spam pages on Google Pages
The URLs have a particular look to them. Examples:
b2006e.e52bb.googlepages com
te09d0.e2ee.googlepages com
Google Notebook is also being used for spam, the google.com/notebook/public/ URLs might look similar to this example:
BDQxVQwoQ_7WTr6Ej
Of interest.
Stopbadware: Malware on Google Blogspot
Certifiedbug: Beware Google Search email alerts on Blogger
