I've been working with these Synapse RF Engines. The advantage over an XBee (Series 1 and Series 2) is they are able to run python code. This allows the wireless modules to do more than pass serial data and pin status. The XBee modules have their place. I am a strong believer of using the right tool for the job and there is more than one correct way to do something. Both Synapse and XBee modules have 2mm pin spacing instead of the prototyping friendly 2.54mm spacing.
There is no shortage of breakout boards for XBee modules. Adafruit has their XBee Adapter kit. Sparkfun has their XBee Explorer Regulated. Seeed Studio has their UartSB which is my favorite FTDI replacement.UPDATE: New UartSB released. But there isn't a breakout board for the Synapse Wireless RF Engine close to $10.
So I decided to make a PCB. My requirement for a breakout board were to be able to use it in a breadboard or plug an ftdi cable into them. I wanted to be able to select the uart and power source.
I added jumpers to be able to select which uart the FTDI will connect to. This also allows you to be able to reverse transmit and receive if you needed to. There is a jumper to power the wireless module from the ftdi or from a 3.3V LDO Regulator. The board has places for four 3 mm LEDs and a resistor network. These can be left off if the user has no need for them.
The next revision will have the ability to plug a 5V FTDI in and safely communicate with the wireless module.