Some great options for holiday cardsRumor has it that members of The Nevada County Composers Co-op were up bright and early Saturday morning, ad-libbing on a sidewalk in downtown Nevada City. The tourists were bug-eyed.Joanna Newsom wowed the crowd, I'm told, at Music in the Mountains' Sunday concert. As one attendee put it: "I think she is a great role model for the younger music listener." Watching the career of this hometown talent will continue to be fun, I'm sure. Bet her family, friends and former teachers are proud of her.During a recent NPR Marketplace report on the radio, I …