Learned that the N4 was again available for sale on Weds 1/30 at 13:00 ET, so I immediately put in my order.
Got a response from Google that the device was to be shipped on Thu 1/31, to arrive at my doorstep in Michigan on Fri, 2/1.
I pulled the full-sized SIM from my Nexus One and trimmed it according to the many guides available online. I got a good fit into the Micro-SIM slot in the N4.
I rebooted, and the familiar "HOME" ID that comes with the Straight Talk T-Mobile SIM quickly showed up on my phone. However, I still had to enter the proper APN data.
I knew from times prior that Straight Talk is finicky about ALL its APN settings - even the APN name must be "straight talk", all lower case. Naming the APN "Straight Talk" will render the APN invalid!
The APN settings as pulled from straighttalksim.com were valid, and the N4 was registered on the ST T-Mo network. SpeedTest.net reported 10-12Mbps downloads in my area, up from only 4-5Mbps I was getting on my Nexus One. I cannot explain this increase, but I'm certainly not complaining.
The transition from the Nexus One to the Nexus 4 was one of the most painless I've ever experienced, SIM-trimming aside. I had been running an experimental 4.2 Jelly Bean on the N1 (sllloooowwww), but had told it to back up my apps and data to the Google cloud. When I powered up the N4, I supplied my Google creds, and within 20 minutes, all my apps, email, contacts, calendar and music had shown up on the N4. I am glad I stuck with ST and the T-Mo SIM, and am thoroughly pleased with the mammoth speed increased the N4 affords.