We sometimes let her have a chew on our fingers because it lets us feel where the teeth are still missing and she seems to appreciate the personal touch. Then again, we may be setting ourselves up for problems later on. Damned if you do, damned if you don't, eh?
I personally wouldn't encourage my pup to chew on my fingers because I would have thought it's a habit that might hamper efforts to get undesirable things out of his mouth (eg if he picked up a chicken bone in the street outside). I want his reflex to be to loosen his grip when he feels my hand there, not tighten it.
Apart from that, I'd suggest you get her accustomed to having her teeth looked at the way a vet would, so that it's easier for a vet later on when your pup has her dental checks.
