I want to start off by saying I created an account here just to reply to this post. I have been following Arduino for the last year solid, Ive been hording article after article of the wonderful things people have been doing with their Arduino's. This Christmas I went out and splurged I broke down and bought one, should be in tomorrow and I can't wait!
As I have been hording the first thing I noticed is the arduino to arduino wireless communication in the beginning was highly dependent on Xbee, which I'm sure is a great product but also propriety. I couldn't find any other good long range wireless arduino to arduino communication hardware or protocol and so I have been following the posts on Morse.
Morse code is great, its universal and audio based, there are so many software titles for the PC to interface with this. It can be connected to a cellphone on a balloon, ham radio ( in any band) , FRS, or even a telephone and you can have any number of arduinos passing information to you or each other in any kind of network topography from a million miles away.
I am very happy to see such an open source "protocol" ( used lightly, but solid communication ) appear to be able to pass serial data so easily. Thank you Raron and all that contributed to this project, you have answered every question Ive had on how to connect every project I have thought up in my head without wires on an unlimited range (with a ham license or telephone).
Matt