Another tip, create your mule character in a different nation as well, there is absolutely no point to having them in the same place. This way you can check different AH's for prices/availablity, and learn the layout to other cities before you go there.
P.S. Ok, I thought of a reason you may want a second char in a specific nation (perhaps even your mains), if your main resides primarily say in Jueno, you may want a mule in a specific nation to buy certian supplies not available in Jueno or whatever nation you usually are in.
Edited, Wed Jan 21 18:22:42 2004 by Ralluwen