you'll likely get an email if you registered the device if not, I'm sure it will be all over the internet, android sites and anywhere else there's streak 7 news. I don't think anyone is gonna let it sneak by unnoticed.
I'm following this thread and I have the WIFI version, so if anyone of you notice the upgrade, please come back and update the thread.
I'm really hopping for this upgrade to be available.
Some of the game I've attempted to install require 2.3 or higher...