As of now, I am focusing all my efforts on coding up Augmented Spatial Pooler as defined in this paper (working on it as of 20 September 2015)
We have put a binary version of spatial pooler here.
Our Spatial Pooler implementation on Github
we have also put a Augmented Spatial Pooler version of the code here.
Our Augment Spatial Pooler implementation on Github
Busy enjoying life! It seems like NuPIC is basically implementation of ideas by Penti Kanerva (which he wrote about in the 80s)..