That picture on Bryce's recent post reminded me of the Silophone, an audio art experiment that answers the question, "Just what does audio sound like if you pump it through an abandoned 10-story-tall grain storage building in Montreal?"
The building, originally known as Silo #5, was turned into the Silophone by the Montreal artists collectively known as [The User], and has been accessible to interested parties in Montreal's Old Town neighborhood through a cool-looking installation nearby the building. You can also upload audio through the Silophone Website, or phone it in live by calling (514) 844-5555. The Website provides a live audio stream so you can hear other people's contributions or, more often than not, the quiet white noise of a completely silent abandoned building.
More Silophone info available in this NPR story from 2001 about the installation. [The User] played the Silophone on their 2003 CD Abandon (RealAudio sample from the WFMU archives). As far as I know, no WFMU DJ has used the Silophone to augment their on-air talking, but really, it's only a matter of time.