To open a full featured mibbit chat window with your preferred irc server/channel(s) presented in the connection form you can add a query string like so:
or if your channel is located on irc.mibbit.com:
Supported (optional) "GET" parameters:
- channel - you even can submit a comma separated channel list (see example)
- nick - if empty a random nick like "mib_3Zh5F4tz" will be presented
Later ("soon") the embedded widget version will support foreign servers as well.