Lost!

[sleepyjeff]

Originally Posted by Ghoulish Delight

So, while we haven't seen his name on either the wall or in the lighthouse, I suspect Desmond was a candidate and Whidmore has figured out that if he can keep desmond there, he still counts as a candidate and therefore the MIB can't leave.

Spoiler(last nights preview of next weeks episode information)

Spoiler:

Widmore mentioned something along the lines of Desmond being the sacrifice that the Island demanded.

Based on that information(and the fact that his name wasn't on the cave wall or lighthouse wheel of fortune thingy) I don't think Desmond was brought to the Island to replace Jacbob.

I think he was brought there for something more sinister, something that may confirm everyone's negative opinion of Mr. Widmore.