Making the World's Knowledge Computable

Has anyone had a go at the latest search engine - WolframAlpha?

They have an ambitious goal - to make it possible to compute whatever can be computed about anything. (more about WolframAlpha). It is no Google killer yet but it seems to do a pretty good job of questions that have an exact answer. Try a search for city sydney for instance and you get a map, coordinates, population, current time and temperature amongst other things.

Is this bringing us closer to the possibility of having a completely free, all digital reference collection?

Hakia

Hakia is a search engine in beta. It says that it is a semantic search engine which means that proximity counts. I would be interested to hear of others experience with Hakia - via comments.