I have been doing a lot of listening to radio streams in iTunes recently. And because of the "surprise" factor inherent in radio listening, an artist will often be played in a stream that I'm curious about. A good provider will format the current stream title to the somewhat standard format of Artist - Song Name which will be scrolled in the the iTunes display while the stream is, er, streaming. Search Wikipedia v2.2 can now detect if a stream is playing, and, if the current stream title is formatted correctly, search Wikipedia using the artist portion of the title. Of course, otherwise, Search Wikipedia will use the playing or selected track's tags as the basis for a Wikipedia article search.