Studio Miniatures have posted an update on their planned release schedule.

From their announcement:

We will be uploading more minis soon with release dates and prices within the next 2 weeks but the plans are for any early November release date, plenty of time to get some for Christmas .

At the moment we can tell you that the zombies will be released in packs of 8 minis (all different), this will be the standard MOB SET. We are currently working on 6 Mob Sets.

You will then be able to buy 2 Mob Sets in a larger pack called a Horde Set. These will contain 2 consecutive Mob Sets ie Mob 1+2 = Horde 1 etc and will contain an Exclusive Mini only available in the Horde Sets. Each Horde Set will have a different exclusive mini.

Once we have the first couple of Mob Sets out we will start to release our Human Survivor minis, these will be individually blister packed unless they are part of a group pack.