Loathe as I am to ever recommend something a Food Network chef endorses (Emeril's All-Clad is anything but, that crap Giada was hawking for a while was horrible, and don't even get me started on the trash Rachael Ray tries to push--my local Fred Meyer has had what was left of her enamel cast iron stuff on clearance 70% off for the last 2 or 3 months and still can't get anybody to buy it), I have to admit the 2 Batali pieces I've been given are quite nice.
Don't get me wrong--I still prefer my All-Clad (and always will; it's the perfect cookware IMO), but if I've got a lot going on with the stoves or nothing is clean, I wouldn't be ashamed to pull out Mario's stuff.
As for Martha Stewart, I think it's self-produced on her part. I've got quite a bit of her stuff from Macy's--cast iron griddle, chili pot, and gratin pans, a salad spinner, turkey lifters, some bowls, a couple of spatulas and spoons, measuring cups, measuring spoons...I'm impressed with all of it EXCEPT for her pumpkin carving kit. Both the knives snapped within 2 pumpkins.
Her stainless steel stuff I'm not sure about as I don't have any--they didn't feel hefty enough when I picked em up, and her roasting pan felt positively cheap.
(I also would never own her linens due to low thread count issues, but that's another topic entirely)