You can find hundreds of weekly essays on the Museum 2.0 blog. You might also enjoy my book, The Participatory Museum.
Here are other recent papers for download:
Going Analog: Translating Virtual Learnings into Real Institutional Change, published in Museums and the Web Proceedings, 2009.
Discourse in the Blogosphere: What Museums Can Learn from Web 2.0, published in Museums and Social Issues, Volume 2, Number 2, Fall 2007.
Beyond Hands On: Web 2.0 and New Models for Engagement, published in Hand to Hand, Winter 2007, Volume 21, Number 4. Reprinted with permission from the Association of Children’s Museums, Washington, DC.
I also write a syndicated column for the American Association of Museums magazine, Museum, based on Museum 2.0 blog posts.