I would be most grateful if someone would share the link with me as well. I've been sans-kobo for a few days..
In case this info helps anyone, I also lost my sd during the 3.2.0 update. It was OTA, and the Kobo was plugged into a USB charger. Tried 20-sec power off & on, pinhole restart, light-button-hold+long-poweron many times with no luck. I pulled the SD card, and it appears that the partition information is missing. Tried fdisk, gdisk, parted, gparted in linux -- all show unknown label or missing partition info. Same with diskutil on Mac and diskpart on Win (expected unknown on Win, though).
Oddly enough, I was able to recover data at the file level using a SD-specific 3rd party recovery utility on the mac, so data is still present in some form.
Thank you!