Normally I'm against America's over litigatious ways, but this is one case where I can't help but feel glad it is happening. A class action suit has been filed against the company and numerous US ISP's in regards to trials of their new products at said ISP's.
In a nutshell, NebuAd are ex-Claria (who used to be known as Gator) staff, a company infamous for silently installed adware and spyware which was notoriously buggy and difficult to remove. At NebuAd these staff are using similar lack of scruples and working in secret with ISP's to spy on customers without any notification what so ever in order to sell this data to advertising companies for split profit.
They were found out though, and it was only after numerous people spoke up and the media latched on to any of this that anything was made public. Understandably people are upset and hopefully this will be one more nail in the coffin of these people and their ways. I somehow doubt it, though.
Source: Arse Technica.