If news about the Viliv N5 being priced in Japan wasn't enough to convince you that a US release was imminent, this full-page ad that Dynamism has in the latest LAPTOP magazine should take care of that.
Prices aren't included in the ad and the links at the bottom aren't showing the N5 when you visit them yet (it's not often that we see something in print before it's online!), but there are full specs that include 3G and 4G connectivity options (HSPA, TD-SCDMA, EVDO, WiMAX) as well as a fancily-dressed girl carrying the clamshell MID/UMPC as an evening bag to illustrate that you can indeed "conveniently hand-carry [it] anywhere, anytime," especially at cocktail parties where "social networking and microblogging" are most important.
It's actually a very striking ad and clearly aimed at American audiences. Viliv usually features Korean celebrities in their ads; the girl in this ad kind of looks like socialite Olivia Palermo to me.