silasmoeckel, the only pin that has an interrupt that is free is D17, all the rest are hardwired to other things. I don't think I could do hardware serial for just RX and softwareserial for the TX?
Seems like I2C is probably my best bet. I'll play with it tonight and see if I can get it working. 2 Arduinos Talking How-To I2C / TWI - YouTube - this is a tutorial I found but haven't watched yet.