If you want to be part of the beta program for the new JRun 4 Updater (updater 7), we are recruiting ColdFusion customers. Go to this link https://prerelease.adobe.com/callout/default.html?callid=%7b046DAD6A-D2F3-47E5-A745-E1C9F38570DA%7d to sign up.
This updater will roll up all the hotfixes released since U6 as well as synchronizing with any and all changes we made in JRun for the ColdFusion 8 release. This is mostly updates to wsconfig to support new platforms (i.e. 64-bit Solaris) and new OS releases.