Wosie is "mouthy" too. She still play bites, and she is 9 months. It drives me nuts, but we just keep working on it. She completely knows what "no bite" means, and will stop when you say it, but sometimes she is so into it, we just have to stop playing with her to get her to quit. We say she has an oral fixation. We do redirect with toys, yelp, quit attention, all the little tricks I learned here. She just can't seem to help it. She has to taste you!
I asked my hubby about it just last night and he said he had noticed she is doing it less and less. We can only hope that eventually she will stop completely.