An idea :)

Possibility to have different login messages for different login accounts.
Like having an default login.msg (which u specify in the ini - ftp_messages = D:\ioFTOD\text\ftp) or possibility to change, like the vfsfile stuff..

and a close message or something like that, which will be activated by SITE CLOSE (or something like that). That command
closes the site down and all that tries to log in gets the message in close.msg (or something like that ;p)... Instead of exit ioFTPD when u gonna play, that would be gr8

Log in restrictions

Speed limits

And last but not least (hehe) possibility to add *@olleponken.dyn.ee as a host mask...