The wiring for this project is fairly simple as most of the heavy lifiting is done in software,

Using an Arudino Ethernet Sheild as your 'base' add a Bluefruit board on top (I did this using a prototyping shield to make it a bit neater.)

The Connections are as Follows:

Ardunio	> BlueFruit (Function)
3v		> 3v		(Power)
GND		> GND		(Ground)
2		> RXD		(Soft Serial data TX from Arduino)
3		> TXD		(Sof Serial data TX from Bluefruit)

You can then power the whole system from either the Arduino or the Bluefruit USB or even the Bluefruit battery connector. The 3V power rail is shared between devices.
Just connect an ethernet cable to the arduino and your router, the device will get its config via DHCP. 
Note: You _should_ edit the MAC address in the serialtopost.ino file to match the one assigned to your Arduino.