CyberStore 1.7.164 which includes the update for the new Authorize.net integration was released today.

What you need to do
To perform the update you will need to download all build versions greater than your installed version, and apply them in order. Update instructions can be found at http://www.dovetailinternet.com/default.asp?LINKNAME=CYBERSTORE_UPGRADE_PROCEDURE. If you do not already have an account for the CyberStore Center, please create one when asked to login.

How to download CyberStore Builds
To obtain the correct builds, confirm your installed version and download all builds numbered greater than your version, and then install them in order. Build files can be downloaded at http://www.dovetailinternet.com/default.asp?LINKNAME=CYBERSTORE_BUILDS.

For details about this release cycle, please check the online release notes at CyberStore Release Notes.