Off-Topica is a good site, my last review said that. I just have problems with activity, and I need to boost it up. Should I hire a person to do a signal podcast, or should I hire a group of people (family friends, ect.) to do one together, I can't do it... My dad won't let me.
Don't take this the wrong way. But, of course you're gonna think it's a good site, cause you made it.
Some people just aren't that interested in off-topic general discussion forums, cause almost any brand of forum offers these off-topic discussions.
It's based on the community involvement that makes most general discussions forums active and popular.
I really don't see how a podcast is going to make your forum active, unless the right people actually hear it ... and you offer something amazing to peek interests in it.
I'm not sure that a Podcast would help to be honest. If you want to do something to help your forum the first thing I'd suggest is to get your own domain name for it.