“The soft rollout of Chicago Public Radio’s new, experimental radio station/Web site hybrid continues this week, primarily on the Web for Chicago-area listeners. It’s called Vocalo, and it wants to be bold and adventurous like performance art for the radio. But will it be the good kind of performance art (very rare) or the which-half-wit-gave-this-quarter-wit-a-grant and when-will-he-put-his-pants-back-on kind (common)?”