We have our first TTN LoRa Gateway working in Buenos Aires working 100%. You can see the status in http://thethingsnetwork.org/api/v0/gateways/0080000000009F73/
Here how to connect your nodes:
http://thethingsnetwork.org/wiki/Hardware/OverviewNodes
Remember the BA's TTN NameSpece are :
02:01:BA:xx
02:02:BA:xx Thanks!
