Don't really have anything fancy to show off for it yet. I don't think a picture of a Marauder hitting a unit with a Siege Tank effect really does it justice. Right now I've just focused almost entirely on creating abilities for heroes, and its going slower than I hoped so I could any extra help.
I'm not using any fancy features yet, like custom UI or anything. I want it to feel like a cross between traditional SC1 and WC3 RPGs, nothing too experimental like WASD movement or strange camera angles. Things like that might come much farther in the development cycle if it seems they'll fit well.
One of my focuses will eventually be intelligently acting mobs. Rather than just patrolling around the map and using a single attack until they die, I want groups of them to fight with a strategy and have abilities that synergize. For example, I have an ability based off of charge that only activates when a unit has already been attacked. So the mobs with it won't run into a battle, but if they happen to fight a hero and start winning so that he has to run away, they'll chase him down even if he has a normally higher movespeed. Later, I expect to have a "fire wall" ability on one of the creeps, and a "pushback" effect on another, so they'll try to continually knock you into it for damage.
All I have entirely done so far is a mob spawning system, and 2 heroes with abilities. I have about 15 other abilities on uncompleted heroes as well. I've got a bit of placeholder terrain, but nothing fancy. Still have almost everything ahead of me, quests, items, etc.
So if you want to jump in, I'm not really so far into it that anybody would be confused by my map yet.