Podscast Ads Market

Hi guys, I'm working on field/market where podcasts are in very early stage, but growing fast.

There is almost no podcast sponsorship market yet, but there will be soon (few month probably ;)). I wondering if you know brands/agiencies form US/UK market that working only on this market (podcast ads/campaigns)?

I'm wondering if it's make sense to be between brands and podcasters? Connect them together and working on best results together. What do you think is the value here? ;)