New army descriptions are on Portal's website here.
Vegas: - Only 8 units! - HQ can take full control of one adjacent enemy unit. There are three modules that can do the same. - 5 battles, 3 rotations, 3 push backs, 2 castlings, 3 movements and 1 sniper Army looks very interesting. Since the units are so few it will definitely require different strategy then other armies.
Smart: - 3 gauss cannons, with Initiative of 2! - 3 transporters that allow to replace them with a unit later in the game - Bio-droid that returns to draw pile upon death - 4 officers and 2 mothers - 4 battles, 3 push back, 1 move, 1 sniper and 2 terror - HQ gives mobility to units around it Seems like a very strong army. A lot of shooting units (especially powerful Gauss guns), transport and mobility given by HQ will definitely make Smart a tough opponent.