Not sure where K0JEG got his information but it is incorrect. If you go to page 10-18 of the manual, it explains step-by-step how to turn on APRS transmission. It takes about 5 minutes to set up and, once you do, it will transmit your location when you key the mic. I just checked on aprs.fi and THERE I AM. This is SOOO cool!!
Glad to be wrong.
I hope they post the manual online soon, because I'm interested in this radio.
You made it to the APRS-IS network through a D-star gateway. You weren't transmitting on 144.390 using 1200 baud AFSK though, and I don't know that iGates on the APRS side will transmit your position to the local APRS RF users like the RF digipeater/iGates will.
I'm not trying to bash D-star, just pointing out that it's not quite the same as APRS and the 2 systems, while combined on the Internet, are not so compatible in the RF world.