I don't think there is a multi-state bar exam...is there??
I know that certain states give their exams on certain days. Usually over 2, I think. I had actually had a long discussion about how the bar works with an attorney at work a while back, but I can't think of it now...
I know you can take multiple tests (I think a lot of people take MA and NY), but I don't remember anything else now, other than that the MA bar exam is easy, compared to NY.