There's already a little script that allows you to use an eggdrop bot (on a *nix box) included in ioBanana v20.
It still needs a windrop bot running on the same computer as the ftpd but it doesn't have to be connected to an irc server. It has to be linked to the other eggdrop though.
The version that comes with v20 was the very first nearly-stable one. What about trying it and helping us to improve it
