I've had the Nolo spam too, at my dedicated Flyertalk address. The fact that several of us have had it at our dedicated FT addresses leaves me in little doubt that FT, or someone within FT (rogue employee?), was the source.

Edited to add...:

I have just reported the Nolo spam through Spamcop. The reporting address for the web site came up as follows:

Re: http://www.nolo.com/ (Administrator of network hosting website referenced in spam)
To: hcab***@internetbrands.com

(Email address disguised to protect the guilty)

So - there we are!!!