Over the last few months I've been seeing more and more folks pimping botnet victim intelligence feeds. Despite the obvious flaws in these feeds, the subscriptions are going up - despite most folks not really understanding how to use the intelligence.
Just about all the data being sold is harvested from sinkholes - which happens to be a rather crap way of gathering that kind of information. There are all kinds of limitations to the way the intelligence can be employed - especially from a protection perspective.
By way of education, I've pulled together an educational post covering the problems with sinkhole harvested data - from both technology and legal/ethical perspectives.
You can find the posting at the Damballa site - http://blog.damballa.com/?p=1342