While "progressive bluegrass" might sound like an oxymoron, it's a good description of this dynamic acoustic trio's approach. Fans of traditional string-band music might flinch at Nickel Creek's experimentation, but there is little doubt that the threesome has attracted the largest crossover audience to the genre since Jerry Garcia....[includes] bonus DVD of the act's seven videos and arranging the audio tracks in non-chronological order to enhance...