You might have noticed it already at Friday the launch of Wolfram Alpha (www.wolframalpha.com).
The semantic search engine from Wolfram Mathematica that gives you answers based on many many linked databases.
(this one is simple in queries and interface, runs smooth, and looks sexy)
For example “how many times fits the goldengate bridge between the moon and the earth?”:
http://www59.wolframalpha.com/input/?i=distance+moon+earth+%2F+length+golden+gate+bridge
Not only the interpretation ans presentation of the data is magnificent, especially when you ask about chemical structures or music notes
http://www59.wolframalpha.com/input/?i=D%20dominant%20eleventh , but how the data is connected?
With this we see that Open Data becomes …