Will there be any cloaked buildings in StarCraft2?
Or zerg units that can mode through the ground?

I don't think there will be cloaked buildings, supply depots can submerge but I'm pretty sure they can still be seen. The tunnel zerg units will be an interesting addition though.

This will be interesting to see. I think we'll have to wait till beta testing to see how it effects game play. I could see this being too confusing. Imagine if both players had units hidden in the grass. Can they see each other? Do they fight in the grass? What would we be able to see then?

We allmost have this in SC now. Even when behind cover theres a 75% chance enemy will miss if ranged.

Thought it was 20% chance to miss air to ground(ground being under tree) or lower ground to elevation.

Ground to elevated is also 75% miss, its all in the manual

Well, looks like there will be cloaked buildings after all (check out mothership's cloaking field ability).

I'm still waiting for the zerg units that can move while burrowed.

i am not actually sure about the cloaking field... the arbitor hav a cloaking field as well but it does not cloak buildings...

Visit:
StarCraft II
and watch the first movie on the right. It has a label "Cloak Field" under it. There you will see a protoss pylon and 7 canon being atacked by another protoss and a mothership of the first player hovers above the canons and cloaks them. Pay attention to the movie.

After seing this movie, my guess is arbiters go bye-bye because cloak field is done by the mothership, recall is kinda replaced by warping units but I don't recall any stasis field so far.

The new time bomb seems like a disruption web. So basically the mothership seems like a buffed up version of the arbiter with a few new abilities. Also, can the cloaking field also cloak units or only buildings?