Apologies about the lack of blog post last night-- I was over at Branden's from early yesterday until this morning, so there wasn't much of a chance to. Anyway!
So Blake, Branden and I have just discovered a cool new function for Starcraft 2 team matches. You can, via opening up a window and checking a couple of boxes, allow your allies to get control of your units.
If this doesn't sound great at face value, that's understandable-- mechanically, you derive no advantage from this practice. However, there's several situations where the team would benefit from each member having automatic access to the others' units. Examples follow:
1) "Mister Gorbachev, tear down this wall!"
Terran players like to wall up chokepoints, which to other players can be endlessly aggravating as your units can't get around them without the Terran player in question manually lowering the wall. Sharing control makes it marginally less annoying.
2) Stupid multi-race shenanigans
1) Terran Medivacs + Zerg Mutalisks = long-lasting harassment of opposing mineral lines
2) Terran Medivacs + Zerg Ultralisks = assault unit utterly invulnerable to small-to-medium-arms fire.
3) Terran Medivacs + damn near every other Zerg unit
4) Marines + Roaches = Low-gas-cost attack force with a damn fine tanking unit to absorb blows for the Marines.
5) Vikings + Brood Lords = Siege force that can be parked outside a base over water/deep space and thereby be damned near invulnerable to ground OR air.
6) Observers + Nydus Worms
3) Twice the force, half the APM!
Consider: two players are attacking. That means that both of them must attend fully to the attack, or the attack suffers. This stops being true if one player controls all the units, thereby allowing the other to concentrate fully on macro. (I did this last night with Bryce, Branden's brother, and it worked out quite well-- he would lead assault forces composed of equal parts his marines and my roaches.)
4) Focus fire has never been so easy.
5) "Help me! Oh god! I'm being attacked! NO NO NOT ON THAT BASE, MY OTHER BASE, THIS IS HORRIBLE"
If you have a detector, and your ally who is getting swamped by cloaked Dark Templars does not, he can shuttle that detector over to his base quickly and easily without having to yell profanity at you. ("Sorry, can't help you, I'm occupied with vomiting on my hatcheries.")
6) Coordinating assaults individually can be difficult.
And is made much easier if you can just grab the spare units at your allies' bases and send them marching along (though this really only works well if they're not specialist units-- I would not want to have to juggle the abilities of a High Templar, Ghost, and Infestor all at once.)
I'd definitely recommend not messing with your allies' production and econ. That's just common courtesy!