3-Way Bluetooth Communication? I need two Arduino units with the HC-06 Bluetooth board to communicate with each other and one of these Arduino units also connected to my Android phone. Is this possible to do with just two HC-06 modules, or even three? Or is there a better solution for this?

To reiterate what is going on here:
I have two Arduinos that are running off battery. Arduino 1 is sending data every 0.5 seconds to the Arduino 2. Arduino 2 collects this, adds its own bit of data to it, and then sends this new data packet to my Android phone which will only be connected to Arduino 2.

I haven't completely decided upon what kind of Arduino board to get, but it needs to be fairly small, but I am planning on the Adafruit Pro-Trinket 5v.

Hopefully you get the basic scenario, let me know if you need more clarification and what you think could be done here.

Thanks a lot!
Should be possible, but only if you setup the Bluetooth module of Arduino 2 as the master. You see, Bluetooth requires to connect to a master. A master can connect to 8 slaves in total. Because Arduino 2 connects to multiple devices (Arduino 1 and your Android device) it should be the master. This also means your Android device cannot connect to any other devices.

Hope this gives you a place to start exploring.