Initially, I wasn't planning of getting a copy of it, since all gameplay videos of SC2 look very much like the first version (only in 3d), and I've played that one to its death already.
But damn, those nice 3D movies, as always! Let's be realistic: I'm probably going to buy it anyway. And going to play through it in one weekend with bad weather. :)
I have played the whole game and I must say I'm completely dissapointed. Just 25 missions in the campaign mode. The story is completely lacking. You play just with humans (except 5 missions with Protoss, but no Zerg campaing)... You have to open a Battle.net account (well, it could be worse, like with Ubisoft's DRM)...