Just got back from my local Walmart in North Carolina. I got there about 8:20 AM and no one else was there. I sat on the bench in front of layaway and waited. At 9 AM I stood at the counter so they would know I wanted to be helped. At 9:03 AM an employee asked me if I had been helped and I said no and that I was waiting for layaway. She told me they don't open until 10 AM (that is for the photo center that is at the same counter) and I pointed to the paper sign that said "LAYAWAY - 9 AM - 9 PM" and she said she didn't know who was scheduled to be there. She went to go find someone.
At 9:07 AM an employee came by to help me. I told her I was there to preorder the Wii U and that we're supposed to do it at layaway. She didn't know anything about it, so I handed her the memo I printed out from here. I told her that there should be a booklet with a bar code for her to scan, and that if there isn't, the manager should have one. She pulled out her radio and asked some lady if they knew anything about layaway for Wii U's, and she said she had no idea. The lady left the counter to go find someone.
At 9:15 AM she came back with the assistant manager who had the paper with the Wii U info and barcode. Yay! He was very nice and curiously asked me how I got the memo and knew about this, and I explained that it got leaked online. He said they were supposed to have signage sent to them to place around the store but that they never got it. He said since I'm #1 that I'll be guaranteed one and that I can come in to get it whenever on the 18th. The lady took my driver's license and put in my info, asked if I was the only one who was going to pick it up (so she could put in an alternate name or not), asked for my phone number, and then I paid the minimum of $42.50. She asked if she needed to print out the label, and the manager said she should so they can place it on the Wii U box if I don't pick it up right away.
They printed out a receipt for me to sign and initial, and then I got my copy and was on my way. Yaaay
So, yeah, MAKE SURE TO PRINT OUT THE MEMO and take it.
Edit: Oh, and the assistant manager said the system will not be allowed to take preorders anymore once the allotment is full. He joked that it was good that I was #1 since they'll probably only get two!