are you unable to flash the firmware? I had a similar problem the other day and it turned out to be a firewire issue. I was stuck with the same message and couldn't fix the firmware, until I switched to usb.
chad i checked your thead out, but you never really said what you did to revitalize your jb3. this really sucks. luckily i made it though moe.down with one jb3 and no problems. i only use a USB connection b/c i have don't have a firewire port on my cpu. the computer won't recognize the jb3 to reinstall the firmware. AHHHHHHHHHHHHHHH this is frustrating.
dood, this has happened many times to me, relax!
d/l the 1.40.06 firmware here: oh and this is for XP, if you have anything older, just go to the creative site, select supposrt, and find the jb3 under 'zen' :
http://us.creative.com/support/downloads/download.aspthen once that 1.40.06 firmware is d/l'd, i dunno if you have to reset the jb3, or just have the jb3 connected and just start the new firmware? but it shouldnt be tricky, JUST MAKE SURE YOU AHVE THE FIRMWARE ON YOUR HARDDRIVE BEFORE DOING THIS
and as a backup, i always have 1.32.02 in case the jb3 getsw finicky and wont let me jump from whatever firmware it defaults to once you try this, so i can go 1.32.02>1.40.06 if i absolutely have to, so d/l them both just to be safe!
the rest is self explanatory and just follow the firmware directiosn when installing
good luck, wish i would have seen this BEFORE moedown