My Visio TV is phoning home to a new URL rlog_sem.vizio.com. It started at 2:00 EST yesterday and has logged 77,910 attempts in 24 hours. Not sure what exactly is being logged but i've blocked it temporarily while I see if it has any adverse effects on the bundled smart TV features. I'll report back when I've figured things out.
I noticed that too, while i was away. 55k queries, I have not blocked it yet.