I just read about the random reboots via Engadget. I experienced this behavior this past weekend while across the state. I live in Spoikane, WA, but was in Longview, WA last weekend. I ran the update the first day it was available and have not had any issues. My phone rebooted at least 5 times between Thursday evening and Sunday morning. I also had random problems accessing data. Since I've been back in Spokane, my phone has not rebooted, but I did have one data connectivity problem that lasted about 15 minutes.
I would not have expected a reboot issue to be affected by geographic location, but there you have it.
Rob