There's an arcade game called the Lost Viking which is a top down space fighter which is quite cool. Shows what the editor can do. There's a few games like this people have created already but this is much more polished
With the units I was talking about, in addition to the critters that got added in a later patch, there's dogs, cows and probably more that I've missed because as I said earlier there's so much going on. In SC1 we had civilians, and they return as colonists this time, but there seems to be about 4 or more different models. One of them looks remarkably like Husky...
Armory has been cool so far but I've only got upgrades to the basic units, but the cool feature is when you get an upgrade you don't have to research it anymore. Ie the stimpack and marine shield upgrades are on marines every mission thereafter from the get-go. There's also the alien tech researched from the laboratory which brings about some cool enhancements, like an auto-turret on bunkers and orbital supply depots, which effectively is instant supply.
Firebats are quite awesome, being as large as marauders, 100hp and 12 dmg to light. Medics are great too. Both units have new voices and sound really good.
Mercenaries are a bit of a let down as they're not much stronger than the regular units, but they only cost a fraction more than the standard unit so it's not so bad. Again I've only seen one type so far so I can't really comment much further on that
Playing around in the bar and cantina inbetween missions is lots of fun, with the news being really amusing (very similar to fox news in the US lol) and lots of little jokes here and there in other parts of the story.