DC, I am sure you have tried this, but let me throw this in, before you throw it out.
Zunes, will sometimes appear to be bricked if the power has drained too low on the device. Before tossing it, plug it into a power source for a few hours and let it charge. I would actually avoid the dock, and go straight in from the USB cable instead.
As far as firmware updates, I have upgraded my 120 and 8, but have yet to upgrade my 30 or 80. I have had no problems yet.
There have been reports of firmware loading and locking up, but usually a reboot of the device clears it up.
I have not heard widespread reports of bricked Zunes, with this firmware, but I don't discount your experience.
Good Luck.