Below is a growing collection of articles, discussions, and blog posts about micro-philanthropy. 

• Towards a Model of Micro-Philanthropy, by Tom Munnecke and Heather Wood Ion
• Microformats and Microphilanthropy, Ishbadiddle blog
• The Longtail of Philanthropy, Lucy Bernholz (PDF)
• Four Definitions of Micro-Philanthropy, Peter Deitz
• Why We Need Group Fundraising RSS Feeds, Peter Deitz
  
• Wikipedia Definition of Micro-Philanthropy