Check out this refreshing hip hop sound from L.A. MC Definite Mass. Free downloads on the Reverb site
http://www.reverbnation.com/definitemass
Music Video:
Check out these underground mixtapes:
http://www.datpiff.com/Yung_Preezee_Typhoon_Funk_Series_-_420_Blow_It_Ou.m117925.html
http://www.datpiff.com/Yung_Preezee_Move_The_Crowd_-_Volume_1.m112651.html