I am in the same boat as you regarding the idea of purchasing the 930 from Expansys to use on ATT. Do you know what network speed would be available. HSPA only or does the 930 support ATT LTE?...
Are there any difference between the beta and the official app on the 1020 with Black? I see that the version number is increased by 0.0.0.1, but that could be just to differentiate.
What is this Lock Screen portrait or landscape mode? Is this a code level option for developers?
I know that Visual Voicemail was available on my Lumia 900, but I don't have it on my 1020. Is this a pay feature? I don't recall doing anything special for the 900.
I bought a 1020 and love it. My only complaint is no Data Sense on ATT. What gives? Any idea on this?