Yes, I sent the below email to Mr. Elop directly.
"Dear Mr. Elop,
I have a couple quick questions, if you have a minute:
I recently switched from AT&T to T-Mobile, and now have a Lumia 810 to complement my 920. I'm trying to figure out if my 810 will receive the "Black" software update. Your website says on one page that the 810 is compatible; however, on another page, it says that it is not available for the 810. Not real clear--to me, anyway.
Software update for Nokia Lumia with Windows Phone 8 - Nokia
Availability in North America - Nokia
Also, any idea why I cannot tether my unlocked 920 on T-Mobile's network? T-Mobile tech support has given up trying to figure it out. They attribute it to my using an "unlocked" phone, and say that is that. Note, the reason I had to downgrade to an 810, was because of my need to tether.
Lastly, there has been a fair amount of concern/rumors that T-Mobile is not going to get/is not interested in getting high end Lumias. As a new customer of theirs, I sincerely hope this is not true, as I am anxiously awaiting a T-Moblie variant of the Lumia 1520.
Best Regards,
xxxxxxxxxxxxx"