From a comment on Matt's blog:

Considering the state of flux in the GOP Presidential field, it's really not too late for OBL to get in and have a serious shot at winning the Republican nomination.

He'd be able to espouse a more conservative foreign policy than anyone but McCain, and with his "Fair Alms" tax proposal, he'd have a more conservative economic plan than any of them.

And, of course, given his views on social issues, I think GOP voters could rely on his judicial appointments.