A number of people have been asking for an updated JumpBox for Joomla 1.6 to include the 1.6 GA release. We have been working on this update but unfortunately our testing of the 1.6 GA release has revealed a rather serious bug in Joomla that prevents the installation of any kind of extension when FTP is used. Since installing extensions is a rather important feature for Joomla we’re holding the update to the JumpBox until a fix is released.
If you’re curious, more detail on the issue that is holding up the release can be found in this bug report. Hopefully we’ll have a fix from the Joomla project before too much longer.