Basil and Sweet, your pups are still a lot younger than many of the ones on this thread. If you have a look back at the previous puppy mummies thread you'll see we were all still feeling the same way at the same point.
It's still so soon after they've been just hanging out with their littermates being able to do whatever they want to. It will come, it just takes time for them to learn and adjust to your rules.
Basil, you did absolutely right putting him in his crate when he was manic - just like toddlers, they get overtired and don't know when to stop - they need you to impose nap time/bed time or they get wired and manic.
As for the biting, if yelping, back turning and distracting aren't working, try a short time-out. Best not to use the crate if you can avoid it, but if you could pick them up and put them behind either a gate or door, just for a minute or so, then let them back in that might work. If they repeat the biting, repeat the time-out - just like the naughty step really, don't make a fuss, just pick them up calmly and silently and eject them from the situation. If you keep repeating it consistently they should hopefully get the idea that nipping stops play.
Sweet, I have moved Pip's crate into the kitchen today, as my neighbours are still away. Just spent half an hour clicking him being in there and dropping treats through the bars, then did ten minutes with the door shut doing the same, then let him out. Now I'm in the living room out of sight (although he can hear me) and he's gone back in and gone to sleep! 
I'm planning to do the same thing over and over several times every day this week and praying he settles in there. I'm hoping being able to see Lurcherboy while we're out might help him settle while we're not around as well.
On a less positive note, after our lovely afternoon at the country park with both dogs yesterday and Pip actually tentatively approaching a couple of dogs I took him for a walk this morning and he was a nervous wreck. 
First he freaked out at an empty pushchair - why - we saw loads at the playpark yesterday and have seen them endless times before, but this morning, apparently, this particular pushchair was scary. 
Then he didn't want to go into the park, then he was visibly shaking and trying to bolt from a couple of Cockers that were miles away and paying absolutely no attention to him. Managed to get him to do a circuit of the park with a jolly voice, lots of persuasion and mounds of chicken then decided to sit on a bench and see if he would calm down - nope. A mum from the school came up to speak to me with her Patterdale pup (half his size) and he did everything he could to escape under the bench - then when another Cocker came in the park chasing it's ball and completely ignoring him (it's Cocker and Cockerpoo city round here at the moment) he climbed on my knee and growled at it. 
I need to keep taking him several times a day, but between that and crate/alone training I am getting nothing else done.