Try the Grid!
“For a brief introductory walkthrough of the grid, try the GILDA Grid Demonstrator (opens in a new window), accept the certificate and follow the steps as described in the EGEE Grid Walkthrough below. The GILDA Grid Demonstrator is a secure area on the GILDA Testbed which is used for training purposes.”

http://www.eu-egee.org/try-the-grid

News on Grid Computing from Europe’s CoreGrid initiative.

“The Grid promise is starting to materialize today: large-scale multi-site infrastructures have grown to assist the work of scientists from all around the world. In only ten years, production Grid environments have grown from a few hundred to several tens of thousands of resources, and from few to hundreds of users.”

http://www.coregrid.net/mambo/

Tools for the grid.

“The Globus Alliance is a community of organizations and individuals developing fundamental technologies behind the “Grid,” which lets people share computing power, databases, instruments, and other on-line tools securely across corporate, institutional, and geographic boundaries without sacrificing local autonomy.”

http://www.globus.org/

http://www.clusterresources.com/pages/products/moab-grid-suite.php

http://www.cs.wisc.edu/condor/condorg/