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It seems that since the skins have been implemented, people who pre-ordered the Deluxe Edition can already use the Deluxe ultralisk skin.
720p game of the ultralisks: http://www.twitch.tv/kaluroo/c/1865225
It's a ZvP where I went double upgrade lings into fast hive for ultralisks.
I was dead curious about the ultralisks so it wasn't really a proper game.
Some zoomed in 1080p ultralisks with two colors: http://www.twitch.tv/kaluroo/b/360504547
Feel free to post other skins once up!
p.s. of course it'd be much appreciated to hit the follow button on the stream, for increased exposure ^_^.