Thanks to Rob Gonda., ColdBox now has nightly builds. You can download the nightly build from the following location:

http://www.coldboxframework.com/downloads/nightlybuild/coldboxNB.zip

I have added the information to the wiki and will be updating the other locations soon. The task runs at 12:00 AM every day. When you unzip the build, you will see a build file included, so you know which one it is.