Leah Libresco, a blogger that I have followed for years, had converted from atheist to Catholic more than one year ago. The main path to her conversion is the moral argument. Here you can see an interview to Leah and Hemant Mehta, a prominent atheist blogger.
Here you can hear the interview. Unfortunately Hemant doesn't appear to understand the moral argument. The question is what is the grounds for morality? Not that the interview goes in depth in the interview but many interesting are said by Leah and if you want more you can always go to her unequally-yoked blog.