Dev_blind is a very simple dev_flash mounter which allows you to write directly to dev_flash through the /dev_blind directory (via FTP servers, PS3 file managers, or any other method)
To developers: the source code is easy to implement in your homebrew programs - check it out!
Warning: dev_flash is a critical component of the PS3 system. Do not modify a file if you don't know what it's for. You may brick your console!