Both come direct from Superpickle CEO and Mailbox frontman Adam Rabin. "Pod" is just his podcast, whereas "news" will contain both news updates and podcast announcements. So join "news" to get both, "pod" for just the music.
I won't be chatting on my podcasts. I'll just be posting songs as I find them or complete them. All podcast items will also show up in the newsfeed (not vice-versa). And my home page (http://www.imadeitup.com) simply shows the last few news items posted. And today, HCR's Dave Delaney responds to Mailbox being dropped from Superpickle. Priceless.