So if you don't have access to SiriusXM Satellite Radio to hear the full interview, I found this two minute clip.  It was a  pretty cool interview and sounds like it would've been fun to hear the entire thing.  Some highlights from the Spin article:

According to Newsday, Vig said the incomplete "Song in D" came from the Nevermind recording sessions but never received lyrics. To which Grohl reportedly quipped, "Sounds like another box set!"

Grohl and Novoselic also recalled how Nevermind felt like a dream come true. "It didn't really seem like this would happen. It was almost like a scam." That might explain the band's frugal living conditions during the recording: Nirvana's members split a room in a $70-a-night hotel. Then again, rappers Kid 'n Play were fellow residents of the Oakwood Corporate Apartments, where Grohl apparently met them at the free breakfast buffet; also among the hotel's denizens were "The Final Countdown" rockers Europe.

The interview was held in a "town hall" style, where the live studio audience and callers at home could ask questions. Other topics discussed, according to Newsday, included the use of a click track (at Vig's request, Grohl used a metronome for his drumming on "Lithium" and "Something in the Way"), alternate producer choices (along with Vig, candidates included Neil Young producer David Briggs and R.E.M./Smithereens producer Don Dixon), and, of course, Kurt Cobain's absence. "I wish Kurt was here," Novoselic said. "There's a big hole here."

Here is the video: