Oxyclean works a lot better than bleach to remove mold and I'm in love with bleach when it comes to homebrewing. I inspect every bottle beforehand to insure that no rotten fruit or cigarette butts are present in the bottles. I don't want that stuff floating in my water bath, because it is disgusting. If the bottles are too crungy or chipped, they get thrown out. I then soak in hot water with oxyclean for 8 hours. The labels should come off as well as the mold. Every bottle gets a good 10 seconds shake with the solution, followed by a good visual inspection with a strong flashlight. If they pass the test, they go to the rinse pile. If they don't, they go back to the "needing oxyclean" pile for another batch. I then rinse carefully, sniff each one for chemical/moldy traces and proceed as usual to sanitize/sterilize. You don't even need a bottle brush.
If you are really paranoid, you can always bake your bottles after the oxyclean soak, visual inspection and careful rinsing: dry heat or steam will not only sanitize but sterilize, assuring you that no microscopic mold spore have survived. It's personally the method I use since I don't have a bottle tree and I really dislike messing with a vinator. I just put clean foil on top of each bottle after rinsing, put them in the oven to bake and retrieve them 12 hours later when they have cooled to bottle. If the foil rips on any bottle, it goes back to the "needing oven" pile.
"How to Brew" by Palmer has a good section on baking bottles with a chart on the time needed at every temperature point. It's old school and needs careful planning (you can't use the oven from the moment the bottles have started heating up to the time they are completly cooled, or you risk shattering), but it is the ultimate option for the anal retentive homebrewer that is scared that non-rinse snaitizers could have missed something. And they don't.
