This all should've been obvious, but there ya go.
The reason I did the analysis is because so many Zerg build orders end as soon as its time to make your first lings, and I wanted to go a bit further. On reflection, though, it makes sense that Zerg build orders are short. You don't always need or want to make a set number of lings-- you can't always get gas exactly when you plan-- and sometimes, if you're ignoring the info you're getting while you scout, that third hatchery will kill you. And so on.
You really need to react to your opponent, and your reaction needs to be tempered by your own skill (or, as in my case, lack thereof).
So I'm gonna post the exact build order (up to ~50 pop) Savior used in that game vs ilove00v. Maybe someone else will find it more useful than I did, or maybe it'll help some noob understand zerg a little better when they fail attempting it (as it did with me), or most likely it'll just end up being some curiosity I posted tonight that has very little lasting value.
Remember, this is my blog (generously hosted by TL.net) and not the strategy forum. I don't have to be gosu to share here.
+ Show Spoiler +
9/9- Create an overlord.
11/17- Send 2 drones to your natural; one to morph a hatchery, the other to scout.
12/17- Morph hatchery at your natural.
11/17- Make a spawning pool in your main.
14/17- Make a 3rd hatchery within your main or at your natural, depending on map terrain.
13/17- Create 2 zergling eggs and transfer 3 drones from your main to your natural.
16/18- Create an overlord.
17/18- Morph an extractor at your main.
18/18- Morph a creep colony at your natural.
19/26- Morph your creep colony into a sunken colony; send 3 drones to the extractor.
21/26- Morph 2 creep colonies at your natural.
20/26- Create a zergling egg.
21/27- Morph your 2 creep colonies into sunken colonies.
21/27- Morph your main hatchery into a lair.
26/27- Morph extractor at natural expansion.
27/27- Morph creep colony at natural expansion.
27/27- Create 2 overlords; morph creep colony into sunken colony; research zergling speed; send 3 drones to natural's extractor.
27/27- Morph hydralisk den at main; send a drone to an inconspicuous location.
26/35- Morph spire at inconspicuous location.
32/43- Create 2 zergling eggs.
34/43- Create overlord; research lurker aspect.
34/51- Create 3 hydralisks.
37/51- Create 5 mutalisks.
47/51- Create 2 overlords; repel any contain attempt by the terran; scout potential expansion sites with lings; and begin harassing the terran base with mutalisks.
That'll take you to the 7 minute 30 second mark. From here Savior initiates muta harrass, and expands with lurkers as defense, maintaining really gosu muta harrass throughout. Eventually he teched to defiler/guardian and finished 00v off.