Self-described "cheerful misanthrope" Jim O'Rourke was schooled in the trenches of experimentalism and high-headed music theory, making music on computers before it was fashionable to do so. Since the late '90s, he's emerged as an all-star producer and sideman (serving as Sonic Youth's bassist on several tours) as well as a relatively prolific solo artist. Not to say that Jeff Tweedy of Wilco's involvement this time around (O'Rourke produced Wilco's 2002 release, Yankee Hotel Foxtrot) doesn't have anything to do with the sheer pop success/excess of Insignificance. Playing Robert Quine or Richard Lloyd to O'Rourke's warped Lou Reed/Matthew Sweet, Tweedy adds crunchy yet light guitar tones on the radio-ready opener, "All Downhill from Here," which is driven home by "woo-hoos" and a happy-go-lucky climax. Oddly enough, this track is a roots-rock rave-up recalling, at least in spirit, Rick Derringer's hit "Rock & Roll Hoochie Koo" or Lynyrd Skynyrd's "Sweet Home Alabama." Add O'Rourke's formula of juxtaposing pleasant streams and shuffles of crystalline easy-listening with unpleasant lyrics (think of a subtler Elvis Costello or less sentimental Morrissey) and delicate John Fahey-esque guitar interplay (especially on the last track "Life Goes Off"), and what you get is a surprisingly ingratiating yet challenging record. O'Rourke may leave his tongue glued to his cheek so that fans and detractors alike can continue scratching their heads, but on Insignificance, it sounds like he's accepted that cruel lullaby pop is where it's at--at least for now. --Cyndi Elliott