I'm working right now on a custom version of Google, that strictly searches all of the best hip-hop sites and blogs. You can get a preview here, and anyone who wants to help build this thing can click the "volunteer" link to join the team and start adding your own favorite sites to the search. We're aiming to establish a comprehensive Google-ization of top quality hip-hop sites.
EDIT: On second thought, I don't think this thing is ready yet for more cooks in the kitchen, so if you have suggestions for siites to add, or other feedback, please put it in the comments!