Last night at the venerable 40 Watt Club in Athens, Ga., Drivin’ N Cryin’ paid tribute to late guitarist Buren Fowler, who played with that band from 1988 to 1993 after working as Peter Buck’s guitar tech and an occasional second guitarist on two R.E.M. tours.

By now you’ve heard about R.E.M.’s Mike Mills breaking the news of David Letterman’s retirement yesterday, but here’s the reason he was even there: Mills and former bandmate Peter Buck reunited on “The Late Show” to back Joseph Arthur’s performance of “Walk on the Wild Side.”

R.E.M. will release a limited-edition 4LP set on Record Store Day that collects the audio from the band’s two appearances, in 1991 and 2001, on MTV’s “Unplugged” series, featuring all 33 songs the band performed at the two tapings, including 11 that never aired on either broadcast.

Buren Fowler — who played lead guitar in Southern rock act Drivin’ n’ Cryin’ from 1988 to 1993 after working as Peter Buck’s guitar tech and an occasional second guitarist on two R.E.M. tours — passed away Friday night, according to messages posted to both Drivin’ n’ Cryin’s official website and Facebook page.

Peter Buck is back with his second solo album, another vinyl-only release — ambitiously titled I Am Back To Blow Your Mind Once Again — that he’ll support with a short round of dates later this month in the Midwest and South opening for and then backing roots-rocker Alejandro Escovedo

Each year from 1988 to 2011, R.E.M. mailed a special holiday single to every dues-paying member of its fan club, a total of 24 singles that featured Christmas songs, covers, live tracks and originals, spread across 7-inch vinyl for the first 10 years, then alternating between CDs, DVDs, vinyl and VHS.