From the Lab ...

... Hacking and Slashing since 2002

Title: RFDigital RFD22301 nRF51822 module teardown
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For kicks, we tore down a popular BTLE (Bluetooth smart) module, the RF Digital RFD22301, which is based on the nRF51822. Pretty straightforward layout; wished they'd broken out a few more I/O. Note that the metal can has been removed. 
They use a fractal-style antenna ... for cost savings, I'm not sure why they didn't go with an IFA, or maybe even a PIFA. 

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