Hope they bring it to US sooner or later. I'm very interested in the product but don't want to deal with importing. Jeff said he was getting one so maybe a video or stream of what it can do at some point.
From what I understand the Vita TV and Vita will share the same storefront... It is region free but you can only use one account per memory stick. You should be able to just use your NA account just fine... but I haven't seen any confirmation on this, just basing it on conjecture.