I have been keeping up with this thread, but haven't registered as a user or contributed as of yet.
I have contacted Vizio this morning about 551XVT and here is the response.
Thank you for your recent inquiry with VIZIO. I would be more than happy to help you with your concern. Here at VIZIO we do offer best in class technical support. We are anticipating shipping to the stores at the end of this week or beginning of next. If you have any further questions please feel free to contact us at 877-698-4946.
"America's Fastest Growing HDTV Company"
606 Gateway Drive Suite 200
North Sioux City, SD 57049
Sent: Thursday, September 10, 2009 06:37 AM
Subject: Vizio VF551XVT
When is the release date in the US for the VF551XVT?
I hope this helps as I am anxiously waiting for this to come out, too.