If you try the later, make sure you do not let your baby cry for too long! (thebabycorner.com)
Just a quick update: We have not let baby cry in his crib, even with one of us right by his side through the whole ordeal, since writing this. (parenting-with-love.com)
I'm not an advocate of letting the baby cry for hours without intervention. (get-your-baby-to-sleep.com)