Hi J.-
I have to agree with Lyndsi's response. I am a social worker and a lot of research I came across in college and in working with clients suggests that allowing a baby/young child to cry for an extended period of time can have damaging effects and possibly lead to something called reactive attachment disorder (inability to bond with others, severe insecurity, etc). Of course this is in extreme situations usually involving neglectful parents (NOT YOU!!!!)- I certainly mean no disrespect to parents who have used Babywise and/or the cry it out method- but research suggests that not meeting a child's needs when they cry for help or comfort may send them the message that they are not important and they cannot count on a parent/caretaker to respond when they are in distress. However, I've heard that there are some good aspects of Babywise when dealing with things like putting baby on a schedule, etc. Just a thought- again, no disrespect intended! Good luck with the sleeping!
***I certainly did not imply that anyone using Babywise is a neglectful parent- quite the contrary. I doubt a neglectful parent would even be reading parenting books such as Babywise or be seeking advice from parenting message boards. I have friends who use Babywise and it seems to work fine for them. To each his own! We all have different parenting styles. I was just sharing objective information I came across in professional journals. As soon as I mentioned the word "neglect", it seems everyone thought I was being accusatory. That's not the case, and I truly apologize if it seemed that way.