Pheedo, a company known for its AdWords-like advertising on blogs and rss feeds, has brokered advertising agreements for two podcasters: Eric Rice and the Chris Pirillo Show. Pheedo's blog entry is here. Other coverage is here and here.
I think the deal with Chris Pirillo is interesting, in that Citrix (the company sponsoring the advertisment) is experimenting with pay-for-performance (PPP) metrics on the podcast. Pirillo will be using a Citrix product in his podcasts, and listeners can use a promotional code to register for a free trial of the product. PPP advertising is a natural fit for podcasters given that standard web advertising metrics will be hard to come by.
Hats off to Pheedo!