Is there a simple way to Cache pages in Express, preferably Memcached? I'm using Jade as a templating system. I'm looking to cache certain pages for visitors for about 30 seconds. Preferably it uses express.render, but I'm open to suggestions. Thanks!

You need to handle result of rendering.

var cache = {};

var getPageFromCache(url, callback) {
    if (cache[url]) {
        // Get page from cache
        callback(undefined, cache[url]);
    } else {
        // Get nothing
        callback();
    }
};

var setPageToCache(url, content) {
    // Save to cache
    cache[url] = content;
};

app.get('/', function(req, res){
    getPageFromCache(req.url, function(err, content) {
        if (err) return req.next(err);
        if (content) {
            res.send(content);
        } else {
            res.render('index.jade', { title: 'My Site' }, function(err, content) {
                // Render handler
                if (err) return req.next(err);
                setPageToCache(req.url, page);
                res.send(content);
            });
        }
    });
});

Implement getPageFromCache and setPageToCache to work with memcached if you need.