I believe all of the diaper services have gone out of business (if there are any left, they have got to be very few and far between.)
I know this ain't a diaper thread, but I've been up to my elbows in $#!+ for the last 5 years, so I feel qualified enough to weigh in on the topic. A big part of what will work for you coming out of one end, depends on what's going in the other end. A breastfed baby has much different p00ps than a formula-fed baby. The breastfed baby will poop more often and many times it is explosive. The formula-fed baby poops less often and it's a little more contained. (Don't let this little detail sway you, though. Breast is best for the baby - read up on it.) Some of the brands of diapers work better than others for various babies. It's good to try different brands but that said, when you find one that works, it's good to stick with it else you should end up with an entire case of diapers you'll never use. I've never tried Kirkland but have always used Huggies (still bought from Costco, no less, so you can save money either way.) Some diapers have flexible sides, some don't. Some are gender-specific, some aren't. Some are more thin and papery than others while thicker ones seem to contain the mess better. Some are cut differently than others and will work best for a certain size baby. There is a huge trend now of going back to the old days of using cloth diapers. I've heard raves about <a href="http://www.fuzzibunz.com/">Fuzzi Bunz.</a> Today's cloth diaper is nothing like the ones of yesteryear. No more diaper pins are needed. They now come equipped with snaps or velcro. Most don't even need rubber pants over them.
Happy diaper-ing!