I don't think there is a 24/7 one.

I know of two weekly shows that are on Fightnews.com

One is tonight, and every Thursday, at 9:00 pm ET/6:00 pm PT - It's called Through The Ropes, and they are talking to Paul Williams and Al Bernstein tonight. They have different guests every week. Here's a link.

TONIGHT: Through the Ropes! | Fightnews - Boxing News Updated 24/7


And almost every Saturday morning, Fightnews.com also has another show from WKNR here in Cleveland, and it usually starts at 9:00 or 10:00 am ET. They usually have 2 or 3 guests each time as well.