Our current config system works great for attaching devices, (through
the probe and attach routines) but there is no support for detaching
them, as far as I can tell.  Is there any work going on in this
direction?

The PCMCIA driver could use it since you can unplug cards from a
running system.  I'm currently writing a device driver for USB and it
has the same problem; devices are attached and detached from the bus
while the system is running.  Being able to detach devices is rather
important for me.  The driver I'm writing is going to go into a small
embedded system where things will get plugged and unplugged a lot.

        -- Lennart

PS. Of course the driver(s) will be made available when they are done.