Copy Limechat discussion to HTML file, open it in the browser, then run this in the console to print the discussion in a simple text format.

limechat-to-text.js

var rows = [];
var xs = $('body').children;
for (var i = 0; i < xs.length; ++i) {
    var ys = xs[i].children;
    if (ys.length >= 3) {
        rows.push([ys[1].textContent, ys[0].textContent, ys[2].textContent])
    }
}
var maxNickLen = Math.max.apply(null, rows.map(function(r) { return r[0].length }));
console.log(rows.map(function(r) {
    return r[0] + new Array(maxNickLen - r[0].length + 2).join(' ') + r[1].trim() + ' '+ r[2];
}).join('\n'));