It's been interesting to discover the things that Iw ouldn't have found normally. Things like Rollyo are outside my personal need, and so they aren't things I'd look for normally.
Many of the things in 2.0 have great potential within library services, but I think it's important to not use them simply for the sake of using them. One or two really well built wikis covering various aspects are more impressive and useful than a dozen small chunks of information.
It's also been handy to review applications from a "learner" point of view. Having spent time previously on Flickr and Youtube it's easy to forget not everyone is familier with these sites and services.
overall, a useful and interesting program. I surprised myself more than once!