I like this a lot. It's a database of publicly available emails for bloggers at major outlets, searchable by keywords. It shows you 3 relevant articles for each blogger, and if you think they're appropriate, you can add them to lists and export CSV files for a press campaign.
Hey Press is free to use, you just have to create an account. They do an intelligent job of "letting" you pay a buck or two when you download. It's optional---the service is promised to be free forever---but it's a smart way to get support from users in palettable increments.
