Survey USA did 50 state polling.  I know, I know, it's early and all, but these things are fun to look at. 
  
Clinton vs. McCain 
 
  
Obama vs. McCain 
 
  
State by State Difference in Performance in Notable States (Obama vs. Obama) 
Arkansas: Clinton +11, Obama -20 
Colorado: C -6, O +9 
Florida: C +9, O -2 
Hawaii: C +4, O +30 
Idaho: C -36, O -13 
Iowa: C -5, O +9 
Michigan: C even, O +1 
Minnesota: C +4, O +7 
Missouri: C -4, O -6 
Montana: C -20, O -8 
Nebraska: C -27, O -3 (and splitting the EVs of the state) 
Nevada: C -8, O +5 
New Hampshire: C -8, O +2 
New Jersey: C +5,  O even 
New Mexico: C even, O +7 
North Carolina: C -8, O -2 
North Dakota: C -19, O +4 
Ohio: C +10, O +10 
Oklahoma: C -8, O -23 
Oregon: C -5, O +8 
Pennsylvania: C +1, O -5 
South Carolina: C -6, O -3 
South Dakota: C -12, O -4 
Tennessee: C even, O -16 
Texas: C -7, O -1 
Utah: C -38, O -11 
Virginia: C -10, O even 
Washington" C -2, O +14 
West Virginia: C +5, O -18 
Wisconsin: C +4, O +11 
Wyoming: C -33, O -19