Desmond Returns

Wow! what a great season finale of lost. Desmond shows up on the boat. We learn from Desmonds re-appearance that he had a connection to Libby. Libby gave Desmond some money for a meal, she also gave him a boat which eventually landed him on "The Island".
Other information:
The boats name is Elizabeth.
Desmond was in the military and was dishonorably discharged.
His ex-girlfriends name is Penelope Widmore, who is still looking for him.
Penelope placed a love letter in the book by Charles Dickens "Our Mutual Friend" that Desmond saves from the boat.

The book: The book is about the son of a tycoon who must marry a specific woman to inherit his father's fortune. He shuns this, leaves, is presumed drowned, which is untrue. He returns under a new identity, gets hired at a company related to his father, marries the same woman on his own merit, not on his father's riches, and only afterwards, assumes his original identity and inherits his fortune. - According to lostpedia.com

Desmond makes a connection between the date that the plane goes down and him not resetting the clock back to 108 on 9/24/04.

Desmond says to Locke the same words he spoke to Jack before he left the stadium where they were running. Desmond says "I'll see you in another life brother".

Desmond inserts the "fail Safe" into the switch, which appears to save the island, but we don't yet know what has happened to him.

Penelope received the phone call at the end of the show from the two guys in the north or south pole, after a warning comes up on a monitor that reads "Electromagnetic anomaly indicated" and was told "I think we found it". This is the last scene of the season finale.

Great lost season finale.