For article on http://dezinezync.com/blog/Using-Logentries-effectively-with-node

logentries.example.js

var express = require('express');
var app = express(),
log;

app.configure('development', function() {
    app.use(express.errorHandler());
	log = {
		info:function(e) {
  			console.log(e);
  		}
  	}
});

app.configure('production', function() {
    var logentries = require('node-logentries');
    log = logentries.logger({
        token:'your-token'
    });
});


app.get('/', function(req, res){
  res.send('hello world');
  //Now where you need to log any information, simply do this
  log.info("Your log message");
  //This, depending upon your applications environment, will either log it to your console or send it to logentries
});

app.listen(3000);