I agree with the previous posters- how the nursery deal with this is a really good indication of how good they are. My daughter was a biter and her nursery dealt with it very well.
Apart from one staff member, none of them made me feel guilty about it and they had a good policy in place. Mum's were notified if their child was bitten and they talked to me about how I should handle it. They spoke to DD and would separate her from the group if need be. They watched her carefully and at one stage gave her a 'spotter' who kept a very close eye and intercepted. They also moved her up an age group early so she wasn't biting babies.
I would speak to the nursery and ask what they will do. I've found developing relationships with the team there very useful- as a first time mum they can give me guidance. And I think it helps the relationship between them and DD. It's nice to have other people around who spend a lot of time with her and are trained to pick up any problems early on.