The results of the second, more complete endoscopy are as follows: they found erosion in her stomach wall and a blood clot. Erosions like this should heal on their own, but given Mom's adult-onset diabetes, she doesn't heal as quickly as she could. They've scheduled another endoscopy for tomorrow, and they injected the erosion with epinephrine to help it heal.
On the good side, they did an EKG and took her blood pressure, and both were normal.
I asked Mom about my coming down to NYC, and basically, there isn't really much I could do for her if I travelled down tomorrow. Josh and Danny are around, a neighbor's watching the house, so all I would do is sit around and worry in NYC as opposed to here...and here, I have gnomi to keep me company.
It's likely that when they discharge her, Mom might need help, so I might head down in November. I'll continue to keep people posted, and thanks as always for the continued good wishes.