Right off, here are my two big beefs with this TV.

First of all, the TV absolutely, positively will not remember network settings. Every time the TV goes off, it forgets my wireless network ID and password, and I get to start from scratch the next time I turn it back on. I've never seen that in a wireless device before. It's to the point where I get a little angry whenever I use the TV -- generally speaking, not a good sign for a product.

It's especially aggravating, since Smart TV features demand you login to the network, even if you're not going to use anything that requires a network collection (like watching a video through a USB hard drive). Skip the login, and it kicks you right out of the Smart TV app entirely, and you have to restart it.

Looked online for a solution, with no joy. Found several people with the same problem, no solution. The Samsung site suggested contacting customer support.

So contact Samsung support I... Read more

This TV Samsung Model: UN46D7900 and also the 55 inch!
To permanently maintain it's WiFi connection with the in House WiFi Router, you first have to get the MAC Address from the TV.Once you have that,now go log into the House Wifi Router usually 192.168.1.1 and also TYPE ADMIN for Name ID and PASSWORD for PW.Unless you have properly secured your own WiFi Router then you would use your secret ID and Password.
Now you need to find Devices in the Router and simply enter the TVs MAC Address there to allow it access.After that is done,every time you turn the TV off and back on,you'll have access because the Router has already stored the TVs Address.I set this up for my Sisters Husband and he has not had a single issue with it.Same scenario with iPods,iPhones,or anything else wireless in the House.Hope this helps those frustrated with this issue.

Well after having the TV to play with all day today I would have to say that I am thorough impressed. I decided to go with the 7900 vs. the 8000 because it was slightly less but all the specs on the TVs matched up. I have had a chance to configure it and now watch a variety of movies and TV. I'll be watching some 3d stuff in the near future and can update that later.
When asking my wife who doesn't really care about things what she thought she said she was amazed she felt as if she was sitting on set watching her favorite shows. Anyone that is looking for an amazing TV at an amazing price from Amazon look no further. The setup was a breeze and didn't have any problems getting the internet up and running. Once I turned it on I was watching tv 5 minutes later.