I discovered the show last year, and listened to it quite often in Apr-May-Jun. I didn't listen as much once my teams were pretty well set up by July.
I've only listened to 2 or 3 shows since the offseason began - I did listen to the 1/19/06 show a few days ago. Nothing special, but I hadn't heard much about Francisco Liriano before (7/33 BB/K in 23.2 IP), so I found that discussion interesting.
Once spring training starts, I'll probably try to listen more often.