Cygri posted some websites that show how the Semantic Web may work.
He collects them using the del.icio.us tag “semwebintro”, which I copy from him, so you find a list with more contributions (or also yours?) here:
The material is practically oriented and is not bloated by theoretical papers on what wishful thingies you may do sometimes in the future given a hypothetical semantic web. I like it as it is: showcases, demos, FAQ, TimBl.