Nice review: Wilco, Sky Blue Sky The return of Jeff Tweedy and co is initially a tame affair. But listen closely, says Graeme Thomson, and something special emerges Sunday April 22, 2007 The Observer Wilco would be a pretty fine prospect even if Jeff Tweedy were happy to be just the exemplary country balladeer he has been since his days in Uncle Tupelo. 'I survived, that's good enough for now,' he keens, all too plausibly, on the gentle title track, while 'What Light' comes on like an old Woody Guthrie battle hymn for those bruised souls who are 'strung out like kites'. It's love