Here's some actual code for the guy that bricked his Glo:
sudo dd if=u-boot_mddr_256-E60610D-K4X2G323PC.bin of=/dev/<your sdcard> bs=1K seek=1 skip=1
sudo dd if=uImage of=/dev/<your sdcard> bs=512 seek=2048
You will need to remove the back from Kobo Glo using an exacto knife or plastic prying tool. Be careful to not mar the finish.
1. Boot your computer into Linux (I hope you or a friend have it installed) and plug your Kobo Glo's micro SD card into your computer.
2. Note the dev node of your card, let's call it "sdX" for the time being. Use 'df' to figure it out.
3. Replace <your sdcard> with sdX while typing out those two commands above into a terminal.
4. Safely eject the card and plug it back into your Kobo Glo.
You can get u-boot_mddr_256-E60610D-K4X2G323PC.bin and uImage from the Kobo Glo firmware at the top of this thread.