Have been playing with the Seeeduino Bluetooth module. Will report more later, but just wanted to note that there's a simple UNIX command to turn your terminal into a … terminal on another port:
Knowing the serial port, you can just type screen portname datarate to show the serial data on the screen. In my case, it was:
screen /dev/tty.Keyserial1 9600
Then I started typing bytes at the PIC, and it sent bytes back to me. Whee! No need for zTerm! To quit the screen app, type control-A, then control-\.