A board very similar in functionality is available at a very low cost here

You can now incorporate Bluetooth 4.0 Low Energy (BLE) technology easily in your project with our BLE Mini. BLE Mini requires only a serial port for communication so it supports all major development platforms that have UART interface including Arduino, Raspberry Pi, Netduino, BeagleBone etc. In addition, we provide you with access to all Ti's CC2540 I/O pins and the ability to upload firmware via USB, making the BLE Mini an ideal development/prototyping board for your BLE project/accessory/Appcessory.

Features

Simple interface - with our pre-loaded firmware code name 'Biscuit', you could easily connect to any development board or IC with UART interface.

Compact form factor - (L)39mm x (W)18.5mm x (H)3.8mm this is a very popular request from makers using smaller Arduino boards like Arduino Mini/Micro/Nano/Pro Mini etc.

Support Central or Peripheral role - it can connect to other BLE Mini or BLE Shield, not just iOS device.

Standalone operation - Texas Instruments (TI) CC2540 is a SoC (System-on-Chip) IC that can operate without any external microcontroller. You can develop your own firmware using IAR Embedded Workbench for 8051 Compiler , all I/O pins of CC2540 are accessible.

Hardware Overview

RedBear Bluetooth 4.0 Low Energy Module (model: RBT01), Bluetooth SIG certified with on-board chip antenna
Texas Instruments CC2540 2.4 GHz Bluetooth System-on-Chip (SoC)
Dimension - (L)39mm x (W)18.5mm x (H)3.8mm
On-board programmable components - 512Kb EEPROM, 2 LEDs (Blue & Green), Push Button
Accessories included - Coin Cell Battery holder & 3 connectors
BLE Mini Schematic is available
Powering options - 3.4V to 11V VIN / 5V USB / Coin Cell Battery (2025 or 2032) / 3.7V Li-ion Battery
Do not connect more than one power source at the same time, otherwise you will damage the board.