Kobo Firmware Releases
Information concerning Kobo firmware releases (including direct download links, links to specific discussion threads and patching instructions) can now be found in its own section in Mobileread's Wiki:
https://wiki.mobileread.com/wiki/Kobo_Firmware_Releases
For historical reference, the original Kobo Firmware thread
can be found here.
AS ALWAYS ... REMEMBER THAT SIDELOADING OR CROSSLOADING THE INCORRECT FIRMWARE CAN BREAK/BRICK YOUR DEVICE. USE THE INFORMATION AND LINKS FOUND IN THE KOBO FIRMWARE RELEASES SECTION OF THE WIKI AT YOUR OWN RISK.