Wow, lots of early teethers here! I've read that the average is 5-8 months. DD started at 8-9 months, but since the middle of September I've seen two little white spots almost broken through DS's gums on the bottom! I thought for sure they'd be out by now, but they're taking their sweet time.
And yes, breastfeeding with teeth is a new challenge, but it's not so bad! DD only bit me once (really hard, broke skin, took a few days to heal...ouch!), but then got used to nursing with teeth. We've never tried any remedies since it didn't bother her, and doesn't seem to be bothering DS much either, but I've heard some good things about the amber necklaces. Plus they are so cute!