Web 2.0 is something that I have heard about many times without really getting a concrete definition for it. It seems to me to be technology that allows people to interact and be involved instead of just being consumers. I'm sure that there is more to it than that - but I've never really been able to put it into a concise definition.
I thought that the articles were interesting and helped shape and define things a little for me. Honestly the second one was sometimes a little over my head with the techno-jargon. However, it did help me to understand RSS feeds and some other things better.
But what is really important about all this is its impact on libraries and frankly I don't think that there is a simple, universal answer to that. Libraries are as diverse as the people and communities they serve. Not every library needs to have a facebook page, a twitter account and a blog. On the other hand, some libraries would really benefit from these. I think that as librarians the best thing that we can do is know our community.