Xbee to Xbee interface

I want to start a wireless communication project using Xbees and I got a couple of questions:

What are the advantages of incorporating Arduinos at either end, if I just want digital outputs depending on the serial input an Xbee receives?

Has anyone done a Xbee project just using the Xbees and their built in Direct I/O?

I read this article:
http://www.faludi.com/2006/12/03/xbee-direct-io-with-adc/
but I can't really get figure his breadboad set up, and the example code there seems a little incomplete? Is that really all you need to type in? I read through the instruction manual on the digi website but they didn't have many examples either. Since its so expensive, I don't have the money to buy it and try to get it working, I need to make sure I have a good design, before I can go out and purchase the parts I need.

Any help would be great. I really just need some direction.

If all you need is digital outputs I do not see any advantage in adding an Arduino.
It may be easier to add new capabilities using an Arduino (especially with SPI
and I2C port).

Try checking the O'Reilly book "Making Things Talk". There are a number of XBee + Arduino examples and I believe one or two solo XBee applications.

(* jcl *)

i really should read more! I actually have a copy of the book but only read the first few examples with XBee, didn't get to the part without the microcontroller.

There aren't any example of digital output but there are analog input and pwm outputs, so I should be fine for what I need. thx