Access to information, the common good, and freedom of creativity are critical concepts for the progressives among us. Lucky for us, David Bollier and friends are at it again - check out the State of the Commons Report and the new Blog by Bollier, On The Commons. This is good and important stuff for philanthropists to consider.
There are a few philanthropy-focused blogs out there, and some, such as GivingSpace seem to have some far-reaching ideals. For a more proven approach, check out
Green Media Toolshed.