Ken - go back to the wiki and take a closer look - I'm pretty sure there's a forum attached to it, and I'm willing to be the question has been asked, and answered, there.
Two things to be aware of - first, this is the D-Link support forum, and second - fun_plug is an unsupported (by D-Link) hack.
Hacking the hardware/firmware is generally not supported by the product manufacturer because it adds a significant degree of complexity to the variables that the support techs must face, and who better to support the hack than the developers.