Some people are hesitant to cloth diaper. Some people would be even MORE hesitant to cloth diaper with used cloth! But I've been cloth diapering full time for a couple of years now and I LOVE to buy used! Saves a ton of money, the cloth is already prepped (natural oils that can prohibit the best absorbancy have been washed out), and sometimes you find really special diapers, like the dip-dyed Tinkle Traps! I don't know if I'll ever get around to tie-dying the prefolds like I want to, but it's nice to have some already done for me!
As far as santitation goes, I sanitize my diapers when I buy them used. I boil the daylights out of them, strip them using Rockin Green (my favorite cloth diaper detergent), wash them with baking soda, rinse them with vinegar, dry them in the sun- in no particular order! :) That, my friends, is more sanitary than the hospital sheets most of us have given birth on top of!
For those of you that have cloth diapered a newborn or are planning to, what kind of diapers are you using, have you used, or are thinking about using?