from HiR Information Report:

I’ve bricked my Fon twice now. That’s pretty much the name of the game when you tinker. Fortunately, the Fon has redboot, and if you enabled telnet access to it (you know, BEFORE you brick it!?) you can un-brick it over the network.

Here’s a log of my un-bricking session. The bold, bright green is stuff I typed in the console. Dark-green is terminal output and normal text is my commentary as I go along.

As I mentioned, I’m running a tftp server on my MacBook, with the files in /private/tftpboot (the default shared folder for tftpd). For reference, I’m relying on the MacBook’s MDI/MDIX auto-crossover functionality (a staple in several ethernet adapters) and using the Fon’s ethernet cable connected directly to my MacBook. You may need to use a crossover cable. My MacBook’s IP is 192.168.1.2 for this lab.

Power on the FON, and as soon as the “Internet” light comes on, telnet to port 9000 of 192.168.1.254. This is RedBoot’s IP address.

GREAT Write-up — definitely worth checking out if you own a Fonera