As of Wolverine #106, we discover more clues to his origins. On his visit with Elektra to visit her family in Greece, Stavros, one of her friends there, said that he knew of a Canadian from World War II. During this time, this Canadian had given him a dagger to use offensively. When asked by Logan if he remembered the name, he just replied "We called him 'Canada'". Near the end of the novel, we see Stavros with the dagger...and on it was enscribed the words "Cpl. Logan". Perhaps another hint to his origins? Only time will tell.
In 2002, the best kept secret within Marvel was finally released. The series, fittingly titled Origin, tells a tale of a young boy named James Howlett who we now know as being Wolverine. The 6-part mini-series, as told by writer Paul Jenkins with the creative help of Andy Kubert and Richard Isanove, is regarded to be the definitive origin to Wolverine's mysterious origins.