I've included the unofficial returns from Kentucky and Oregon, and Barack Obama has now narrowly won Frontier, his fifth region in our 10 Political Regions model. His strongest region remains the South Coast, while Hillary Clinton's strongest region is Cumberland (which includes most of the almost-all-white Appalachian area that has been getting so much attention in recent weeks).
Obama is now ahead in the national popular vote by 160,000 votes if you don't count Michigan (where he wasn't on the ballot and both candidates pledged not to campaign), and Clinton is ahead by 168,000 votes if you do count Michigan. (Arguably, Obama's strength is understated in both cases because he did exceptionally well in caucus states, where the reported popular vote totals are much lower than in primary states.)
The recent primary results also reinforced the pattern by which Clinton does best in counties where George W. Bush significantly increased his share of the vote from 2000 to 2004 (perhaps Democratic voters in those counties overestimate Republican strength nationwide) and Obama does best in counties where Bush lost ground between 2000 and 2004 (perhaps those voters overestimate how easy it will be for the Democrats to win this year). The former category includes much of Kentucky, where Clinton won yesterday; the latter category includes a big chunk of Oregon, where Obama won.