Arvid Kahl recently launched Podscan, which is like Google Alerts for podcasts 
Arvid says it transcribes every English-speaking podcast and monitors keywords.
You can sign up, specify a keyword, and Podscan will notify when and where your given keyword or product was mentioned 
In another tweet, Arvid writes…
Here is my product, Podscan.fm, detecting a mention of itself on a show it is monitoring and then notifying me about it.
And now I get to share this amazing podcast I didn’t know about before with you.
Might be a useful tool to boost your own business.
Or you could start something new with this 
How about offering a service where you monitor brand mentions for clients?
As well as Podscan, you could use tools like Brand24, Google Alerts and F5Bot.
You could also offer to keep an eye on your clients’ competitors, see where they’re getting mentioned 
Then you could do outreach on behalf of the client, see if you can get them on podcasts or set up collaborations based on those mentions.
Of course, before you go too far down that rabbit hole, best do some riskiest assumption testing 
Back to Arvid: we also featured him several months ago…