well like we all know that zerg gets smoked by terran. RITE!
So you build sunkens, rite...?! wrong!
sunkens are sitting pieces of crap for seige tanks!
So you build zerglings to attack the tanks, rite....?! wrong!
A good attacker would include firebats, marines and medics so zerglings have no chance.
Seems kinda hopeless eh...WRONG!!
Heres a simple tip that will stop terran tanks in there tracks!

First you have to be somewhat familiar with zerg to do this cause it does require some speed. The average terran player would take around 8-10 mins to get a group of marines, firebats and medics together with about 4 seige tanks. That doesnt give you much time.So you crank out your hydras and morph into lurkers around 8-12 is good.
NOTE: Not a good idea to use 1-2...just doesnt work.
Then build 1 or 2 sunkens as bait. Take your lurkers and burrow them where you think the seige tanks can reach your sunkens. Ally up with your oppentent. JUST THE ALLY PART NOT VISION. Once he seiges up over top of your lurkers unally and blow his brains to kingdom come. The if possible drop the lurkers or have a batch of mutas up and ready to attack.

GOOD LUCK BOYS THIS TRICK HARST PI$$ES PEOPLE OFF SO HAVE FUN!!!!

CreepColony's Opinion: Be careful when allying and unallying. And Terran owns Zerg? Isn't it the other way around?