After Extractors etc run out of gas, you can "upgrade" them for 100 minerals to gain an extra 400 gas. This has to be done quite often so adds to the macro-part of game. Creep tumors spread creep fast, you simply select one and place the next one cheaply within a radius, really easy. Roaches can be very very deadly. Warp in is INSANE, you get your units instantly, anywhere you want within pylon power. That includes below a Prism in your enemy's base. The queen can "save" larvae for later with the ability "Mutate larvae", this allows for another larvae to spawn. The mutated larvae can be morphed into any unit in 3 seconds, allowing for instant resupply of your armies if you got the resources. The Mutated Larvae can also move around and take 1 pop. Kind of like warp-in for Zerg, but not as simple. Nydus worm works like this: You load units into it at any worm, the units are then inside all worms across the map (kind of like a big bunker), then you can load them off at any exit. You are never at a risk to loose your units. If the exit is destroyed you can always unload the units in your base. The Jackal kind of is a fast firebat on wheels, they even gave it the firebat voice for now. Source: http://www.sc2pod.com/news/45_new_photos/ I don't know if I like the gas thing. When a geyser runs out of gas, I think you're supposed to get a new one. Warp In sound ridiculous now that you get the units instantly. I think it will be abused. There should atleast be a 3-5 second cooldown before they're fully warped in.