Hope your little Westie makes a speedy recovery JP!
Great thread this, Aristotle I have the same issue with biting and mouthing. I have an Airedale Terrier and he's 11 weeks old now and he is getting better, although the state of my hands and especially my feet would say otherwise!
There is lots of good advice on here but ultimately i think its just something you have to wait for them to grow out of, and try to shape good behaviour and the right thing to do along the way. I very much agree with the positive training methods such as offering something they are allowed to chew on as an alternative,but at the same time I think this is more a way of teaching them for the future than putting a stop to the biting right away, I just don't believe there is an instant solution. The books tell you a firm reprimand should be enough - they've never tried it with an Airedale obviously! We tried the yelping but no effect - he had 13 brothers and sisters to play with so I think he's just so used to this kind of play. So we've been giving a firm no and offering a toy to chew, sometimes it works sometimes it doesn't. He is much better with biting hands since we've done this, I've also found making a fist is effective. Biting feet is another matter though, and it bloody hurts. If he doesn't respond to the 'no' he goes into the kitchen for a 'time out' - we have a babygate up so he can see us all having fun without him - he calms down and seems to realise the attention and games stop when he gets bitey. It may take a few trips to the kitchen for time out before he totally stops but it does seem to be working, you really do discover new realms of patience when you own a puppy!
Similar problems here with the housetraining, we are taking him out regular and when he goes in the house I'd say more often than not its our own fault - except for when he won't go outside then goes as soon as he sets foot on the carpet again! Its just a case of perseverence I think, George is 11 weeks and we have a long way to go but we'll get there in the end. Do reccommend crate training too, he hasn't gone once in there, dogs hate messing where they sleep.
Had the crate in my room originally and it was fine for a while but now he just won't settle in there,he much prefers running around the room and cries and cries when I put him in there, so now he sleeps in the fabric crate in the kitchen where he spends a lot of time and feels a lot more comfortable. He can sleep from 10pm to about 6am but then he really needs to wee so you do have to be prepared for the early starts