Lets say you want to start a blog in a field you dont have any experiance in and don't know where to get the news from. Lets say 'Skateboarding' or 'Automobiles' etc. 1: Where can you find a list of the major companies PR email lists so you can request for them to send you information instead of going to *each* website and looking for the contact?
Or how about you just start a site on something you know about and are interested in so you can write unique posts?