After four months of controversy, Los Angeles-based poet Wanda Coleman, recipient of the 1999 Lenore Marshall Poetry Prize from the American Academy of Poets and a National Book Award finalist last year, wryly concedes that she's received more attention for one book review than for anything else she's ever written. One bad review, that is, of Maya Angelou's latest book, A Song Flung Up to Heaven, the third volume of an autobiography by "the Inaugural Poet." In an April 14 book review in the Los Angeles Times, Coleman concluded, "Unfortunately, the Maya Angelou of A Song Flung Up to Heaven...