kbdmux support for ddb and mountroot?

kbdmux does not currently support ddb and mountroot in both -current and 
6-stable.  This means that if you get a panic, no backtrace or other 
interaction is possible.  Also, if your /etc/fstab is wrong, no way to 
specify an alternate root.

Are there any plans to improve this?  What needs to be completed to get 
back to previous support for these features?

Thanks,
-- 
Nate