A Developer’s Guide to PR and the Media
blog.fogcreek.com
blog.fogcreek.com
People find out about the project through the press release, and ideally will join your mailing list, follow you on social media, etc in order to keep up with the project/product as it develops.
A content campaign aims to inform a much wider base of people. It's best done ahead of any specific traditional 'PR campaign' for a launch. An easy way to do this is to create two lists of contacts: for your content campaign you might target amateur bloggers, industry influencers and your existing advocates.
Every founder needs to understand the basics of PR, and this interview goes through that perfectly.