Middle Distance Runner has long been one of DCist’s favorite local bands. They’ve been a Three Stars subject, an Unbuckled band, Unbuckled DJs, interview subjects countless times, recipe contributors and more to the site. And our main source of blog-space enjoyment always came from the wacky and wonderful Mr. Ian Glinka, the band’s bassist. Through a note on MySpace this weekend, he announced that he’s leaving the band. We talked with Ian this afternoon about…