A DECADE AFTER their inception, podcasts are hitting the mainstream. You can argue about why (everyone does), butthe numbers don’t lie. At this point, podcasts are a bit like the Internet in the 90’s: Growing so fast that regular people are interested and even the die-hards can’t keep up. Apps like Overcast and PocketCasts are great for people who know where to look, but everyone else really, really needs a discovery tool. A search engine. And don’t look now, but here comes Google.