"Plus sites like whiteblaze that are AT or long distance hiking specific are great sources."
I hope no one objects to sort of pointing you elsewhere, but whiteblaze.net really is THE place to look for information when you're prepping to hike the AT.
http://www.whiteblaze.net People regularly submit their current gear list for others to review and give feedback on there, very typically with an AT thru-hike focus; a couple posts like that just went up today, in fact. You can search for those, and definitely look in the "articles" there too.
This (backpacking.net) site offers great help with a great environment and nice people, but is a bit more general purpose. You can certainly get all the packing list prep help you need here! On whiteblaze, however, you'll get feedback from a lot more folks who have experience hiking the AT in sections, chunks, or all in one go.
In terms of your specific gear, if thru-hiking the AT is a key criteria in your selection, then it would be helpful to know if you have any a priori intentions as to what time of year you would plan to start --- typical start dates for northbound hikes are in March or April, but some folks start earlier or later. It makes a difference in the optimal gear to carry. Also, consider whether you'll be able and want to own or borrow gear to be able to swap out an item or two as the seasons change along the way. Not required, but can be nice to keep the weight down in the warmer months.
So for example, a hammock requires insulation UNDER the hammock as well as on top unless you're in pretty warm weather. It's also a really bad fit with a bag liner, IMO --- sounds like a whole lot of needless wriggling around. I am not a fan of bag liners in general, and certainly not an 18 oz liner! Or is this "liner" really a lightweight sleeping bag??
Camp pillow: pretty individual choice; some use spare clothes, others pack light enough that they have no spare clothes on colder nights. I personally use a (montbell brand) inflatable.
An alcohol stove is a fine choice. Is the cup that fits on the Nalgene bottle for cooking in? I suggest replacing the Nalgene with soda pop and/or gatorade plastic bottles. Tea kettle: I don't do hot drinks, but even so it strikes me as a bit gonzo to have a separate metal item just to heat tea in.
You've got quite a lot of gear to obtain/replace. I suggest you think in terms of DIY if you're inclined at all that way (Do It Yourself, i.e., make some of your own gear) and/or identify what you want and watch and wait to buy on sale or buy second hand. Plus the usual suggestions of knowing what to look for in thrift stores, even military surplus outlets perhaps (and perhaps not, do make sure you've done your homework).
There are some great books out there on going light, too --- including a couple new ones this year, one by Andrew Skurka, another by Justin Lichter, and various others such as by Mike Clelland, Ray Jardine, and others (I can come up with a longer list if you like!). Have a look at your local library to see which of these are available; check it out and read it through. Before you buy any more gear.