I'm not of a whole lot of help, I can say that Brutus did a lot of the biting at that age as well. We told him no, stopped playing and such. More then anything I think he just grew out of it (he will be six months 1/6) I think it stopped right around 3 months though.
I think the same thing with putting stuff in his mouth, although Brtutus still does this. I call him a little vacuum cleaner. If it's on the floor/groud/patio he grabs it. We are working on the drop it lesson right now.
Good luck & congrats on Rumble! Would love to see some pictures