Congratulations and I'm so glad everything went well and they all seem healthy.
Some cats cry, some don't. Deja vu didn't. When the first kitten started to contract, she gave out sort of a little yelp, but I think that was more from surprise. She didn't make any other sounds after that.
Feed the mom kitten food during the time she's nursing (but go back to regular for her after the kittens are weaned, which should start about 4-5 weeks.)
You don't have to worry about food for the kittens until then, unless the mom is not feeding them enough. If that is the case (and only if) then you could get something called kmr (kitten milk replacement). But if mom is doing her job, then don't interfere. Mother's milk is best for them.
Here is a link to a site with lots of articles on pregnant cats and newborn kittens:http://search.about.com/fullsearch.h...=pregnant+catshttp://search.about.com/fullsearch.h...ewborn+kittens
Some cats will allow their people to handle the kittens. Some won't. So far seems like yours will, but take your cues from her.
As far as handling goes, there are different schools of thought. Some feel you shouldn't handle them at the beginning at all. Others feel that handling, touching and interracting with the kittens gets them used to humans and makes them better companions when they grow up.
My belief is with the latter as long as it's interracting and not interfering with Mom.
When Deja Vu had her babies, I would lay there and watch them (I loved watching then nurse), talk to them, stroke their little bellies and heads. I would only pick them up to check them over, and never lifted them very far from Mom, or for very long, just a few seconds. As they got older, a week or so, then I might pick them up for maybe a minute or two and cuddle them, but then right back in. If I saw the least bit of discomfort on their part, again, right back in. Rocky loved the attention. Some of the others didn't. You'll see which ones do and don't as they grow. Try to go by their cues too.
When their eyes open (which is about 10 days or so) be careful not to pick them up too high..they can get frightened. When I would play with them I would always be laying down or sitting on the floor.
Good luck and enjoy them!
PS: I hope after this you will have Mom spayed. That should be done as soon as possible after the kittens are weaned and Mom's milk is pretty much dried up.