East Coast, West Coast, Dirty South, Mid West?

I'm starting to get a hang of guessing East Coast, West Coast, and Dirty South. I was listening to some old stuff (03 Bonnie and Clyde) and had a feeling that Jay-Z was from the East Coast and Beyonce was from the south. Not bad. Notorious helped a lot in understanding the difference between East Coast and West Coast. I really like This is Why I'm Hot by Mims. Everybody pointed how it was dumb because he says he's hot because he's fly, but I love how he features each hip hop area in the beginning of the song. Here are the artists' I've nailed down so far:

West Coast
Dr. Dre
Tupac
Suge Night
Snoop
Coolio

East Coast
Biggie
Puff Daddy, or Puffy, or P. Diddy, or Diddy, or the artist formerly known as Diddy
Jay-Z
Busta Rhymes
Lil Kim
50 Cent
Mims

Dirty South
Nelly
Beyonce (probably shouldn't be in this list because she's so hard core r&b)
Missy Elliot
Nappy Roots
Young Buck
Three 6 Mafia
Chamillionaire

Chicago
Kanye (LOVE him right now)
Lupe Fiasco
R. Kelly
Yung Berg

I guessed Faith Evans was Southern... technically she was born in the south and then moved to Jersey. I'm not sure what that classifies her as... maybe both?

I think I want to look at the top songs from 08 and classify them. I"m wondering what West Coast hip hop looks like now.