Superkb still uses diapers, so there are no binary packages yet. Still, there are three ways to get the source code. You can either:

Most recent packages

The current version is: v0.23, released on 2013-08-31.

Changelog (since -proto3):

Some notes:

Downloading the latest code

Development version is currently held in Git, which you can download by issuing:

git clone superkb-git

Brosing the Git repository

As an alternative to downloading the whole code, you can point your browser to and view individiual files by using Github history browser.