This might be mispaced, but...

I would like to have a button on my website that would add a repo. I have an idea on how to do it but I do not have the ability to do so.

I need a php script that ssh's an iPhone, logs in as root and writes a line to the Cydia.list file. It should try 4 different 192.168.1.x IP's and another four 10.x.x.x IP's. Thank you.

Post scriptum: If root access isn't feasible, then make a symlink to the Cydia.list file.