$5 says brian smith doesn't finish his zombie mod
Or that he doesn't release it.
he mentioned something about never releasing it :(
Which is why no one should give a stuff about his bot mod or zombie mod. It's a little personal project just to showcase. Yeah pretty cool.
From what people have seen, Badspot and Rotondo are working on AI. I'd much rather prefer using bots made by the person with the game's sourcecode than someone showing off their coding skills.
I've always figured the reason v8 could have so many zombies is because the AI was very simple. It just went for the nearest player, no going in a direction every few seconds. That's why they're "better" and you can have much more. I don't know what the WIP AI has to offer, but for now Left 4 Block with only Normal, Slow and Fast Zombies with the setting "Always Find Players" should be good. You just need to whip up a script to fake-kill bricks (to at least see the physics), and kill them a few seconds after.