My suggestion is that you top using your chat thing that's capped at like 20 users or something and switch to IRC, you can have people connect to it using their clients, or using http://qwebirc.org/ which is web irc, a client that you can put on your website, IRC servers are not super expensive also you can just use a free irc server(I suggest you using http://www.rizon.net/home) and create a channel for Icecold on it.
It has much more features and can hold as many people as you'd like.