Went to check out the One X at the local AT&T corporate store today (on Townsend near AT&T park.)
The white demo unit was dead but they were nice enough to charge it up for me.
Nice phone, striking design, very light. The screen is beautiful and it seems very fast and smooth.
It well be available May 6, and I'm thinking of picking one up and handing my skyrocket down to my daughter, but I'm not sure I can live with the fact that it only has 16G of storage and no option to add a micro SD card.