It appears that the server that miniaim used has been taken
offline. miniaim is not compatible with the normal
(OSCAR protocol) AIM servers, and as far as I know, the server that
was taken offline was the only one that supported miniaim.
So, for the moment, miniaim isn't usable.
I've had a few e-mails asking me if I will update miniaim to support the OSCAR protocol. I'm not yet sure if I'll do that. I primarily use a Mac these days, so I don't use miniaim much, and it will be hard to make myself work on something I don't use. :-)
Thanks to everyone who used miniaim over the years!