I went to:
http://www.amazon.com/gp/help/custom...deId=200529700
It said:
"We're excited to announce that a new, free software update is available for the latest generation Kindle 6" device. This software update adds the ability to create a new Amazon.com account directly from your Kindle, as well as additional performance improvements. "
Thus, it is not preview anymore, but FINAL.
I followed the instructions and ended with:
Version: Kindle 3.0.1 (525120101)
I also received a new unit from Amazon and sent back my old unit with a label only containing bar codes - no printed address. I hope it gets there.
The version I downloaded was for Serial # B008 - WiFi.
They have another version for Serial # B006 - 3G - US and Canadian customers
And yet another for B00A - 3G - European customers