Just came across this interesting example of nonprofit tagging via a blog post on netsquared by enoch choi. Dr. Choi is an individual contributor to Google Health Co-op and works on the non-profit Palo Alto Medical Foundation's tagging efforts @ Google Health Co-op as well. The intent of the tagging is to improve healthcare search for patients.
Here is his description from one of his personal blog posts:
The work I’m doing with Google Co-op involves helping make a list of the URL (universal resource locator, the web address) of websites to improve health-related searches. These labels will appear at the top of Google search results for search queries regarding any health related term. Subscribing to me means you trust my annotations (tagged links) and those links increase in importance within your search results when you use google to look for health topics. I’ve been tagging via del.icio.us for a while, and my purpose was to try to help make higher quality health information easier for people to find. I don’t see how Yahoo has been improving del.icio.us and the bookmarklet is getting slower and slower.
Pretty powerful - combining tagging with search - the human curation of information. Reminds me of something I read in Andrew Blau's paper, "More Than Bit Players" and now can't find it exactly.