[LesZedCB]

If you are into amateur radio, this [1] does something similar, allowing you to tune into amateur bands across the world in real time.

[1] http://websdr.org/

[jff]

And it lets you listen to real radio, not streams, which will improve coverage outside of the US and Europe (found two streaming stations in Japan, neither of which work, and about a dozen in all of India)