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It's being used on the Ben Mulroney and Ben O'Hara Byrne shows across the Corus network. The idea is to make a comment on a subject, suggest a topic or give feedback on what you think of their shows. (If it sounds a lot like the Talkback feature that Bell recently launched, I'm guessing that's not a coincidence, although that one is restricted to just 30 secs. So far, it hasn't been used a lot.)
When you call, you're asked to leave your name and where you're calling from, then wait for the beep and let loose. We'll see if this one works any better than 1010's.
If you'd like to try it yourself, the toll free number is 1-833-724-1811.
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Seems like they're trying to bank caller audio for when their shows aren't live
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CHQR in Calgary has also been running promos for a listener line for people who want to phone in but not want to go on the air live.