I just ordered a TNC-Pi 2 (they have a model for the older Pi versions as well) from Coastal Chip Works on Wednesday. It was in my mailbox on Friday – FAST service!
Nice looking board, well put together. I’m curious to see how well XASTIR works on the Model 2 Pi (it was reported to be “sluggish but acceptable” on the original Pi.). The higher clock speed should be a 2x improvement and quad cores should help as well. Hopefully it is peppy.
As it extends the entire I/O connector, it is very easy to plug an Adafruit Ultimate GPS module on top of it.