Those who watched K'naan, "the dusty foot philosopher," open for Damian "Welcome to Jamrock" Marley a few years ago at the Showbox witnessed the birth of a new hiphop star. Originally from Somalia, and currently based in Toronto, K'naan makes a hiphop that is the meeting point of two musical cultures: black African and black American. On some tracks, he rhymes over hardcore hiphop beats; on other tracks, over thundering African beats; and on one track, over no beats. K'naan is the definition of an organic intellectual; he gives back with the knowledge of rap. (Neumos, 925 E Pike St, 709-9467. 8 pm, $10, all ages.)