Just wanted to let you know that I have finished a "payload" for Jasager, much more annoying and funny as it's based on Nyan Cat!!!
Also, I made an install script for freshly-flashed foneras/pineapples with the Jasager firmware: create the password through telnet, copy the files and launch the script over ssh, then the router will reboot and be ready to go.
If you looked at the code, I know... it's copy pasted without any sense, but works!