as indispensable as their e-mail client

Wired News: Aggregators Attack Info Overload

Aggregators, such as NewsGator and AmphetaDesk, allow users to subscribe to feeds from sources as diverse as the BBC, Sci-Fi Today, Slashdot and thousands of bloggers across the world. The services work by checking an Internet address at a regular interval, usually once an hour, to see if new content has been added.