While I've been using the Divx 6 components installed by Toast 7 for a few months now, many of my clients have struggled with there not being a Quicktime 7.0 compatible version of Divx for their machines. On a few, I've been able to install the Divx 5.2 beta 3 distribution, but many have simply gone without, or have backgraded to Quicktime 6.5.2. VLC plays most video files, but it's not always the answer.
Today, Divx 6.0 was released (outside Roxio's distribution with Toast 7) for download. It sports Quicktime 7.0.x compatibility and even includes a demo version of a Divx encoder.