• Add CMT.com's Chet Flippo to the list of people who love YouTube. "Imagine being able to pick from literally dozens of Johnny Cash clips, including duets with the likes of Linda Ronstadt, Roy Orbison and Carl Perkins, and Cash tributes from the goofy to the sublime. There's George Jones and Alan Jackson and Dolly Parton, including her appearance on The Tonight Show when host Johnny Carson told her he would give a year's salary to peek under her blouse." (CMT.com, via The Velvet Rope)

• A new documentary examines the tritone, the "Diabolus in Musica," a musical interval found throughout music history that has a devilish sound. "West Side Story" has it. Black Sabbath has it. Wagner had it. (BBC.com)

• The Wrens have a lot in store for fans: A new album is in the works, a remastered reissue of their 1997 EP Abbot 1135 and some old and unreleased tracks posted at the band's website. (Billboard.com)

• Boot Camp Click's next album, The Last Stand, will be out July 18th. Production credits go to Pete Rock, Large Professor, 9th Wonder, Beatminerz, Coptic and Marco Polo. (Rap News Network)