I'm just got my XBees and had a lot of fun already. But I didn'tlike the feeling of just ignoring the 3v3 logik level and connecting it straight to the Arduino. Out there in the internet exist 1000 ways of levelshifting and I don't know which to use. I have some AMS1117 3v3 voltage regulators lying around. Could that work? I also found some ways just using 2 resistors. What is the disadvantage of these methods? They seem a lot easier than buying level shifting chips.