I know this question gets beaten to death after an incumbent loses a primary, but I'll ask anyway:
Is there anything prohibiting Murkowski from running as an independent? She could probably still get a large share of her personal vote, and I could easily see Democrats abandoning their official nominee, Scott McAdams, the Mayor of Sitka (pop. > 9000), to make a pro-choice, SCHIP supporting relative moderate like Murkowski the de facto Democratic nominee. Picture McAdams--who as of last month raised just under $10k---as Kendrick Meek without the core African-American support.
Apparently there's nothing stopping her doing so. I doubt she will, but it would make things a bit more entertaining.