Regina Spektor writes the kind of crazy-quilt confessionals we used to hear a lot from 1990s alt-rockers but don't get enough of these days. The Russian-born Lower East Side piano punk has the European yelp of Björk, the loopiness of Fiona Apple, the too-much-information torridness of Tori Amos and the slanted critical eye of Liz Phair. But none of those girls ever interrupted a song about...