From Information Today:

FEATURE
Building a Library Web Site on the Pillars of Web 2.0
by Karen A. Coombs

Web 2.0 is often defined by the technologies that are part of it: social software, Weblogs, linklogs, folksonomies, wikis, podcasts, RSS feeds, and Web services. Because of this, some see Web 2.0 as merely hype. However, if you examine the technologies to see what they have in common a pattern emerges. “Web 2.0” is transforming the Web into a space that allows anyone to create and share information online—a space for collaboration, conversation, and interaction; a space that is highly dynamic, flexible, and adaptable.

Further discussion and reading led me to design six pillars of Web 2.0 that we wanted to use as the foundation for rebuilding our library Web site. These six pillars are as follows:

1. Radical decentralization
2. Small pieces loosely joined
3. Perpetual beta
4. Remixable content
5. User as contributor
6. Rich user experience

This paper is an interesting analysis of the Web 2.0 thinking in the re-design of the University of Houston libraries.

I like how they have Subject Blogs.