I'm no Ventolin, but my gut tells me that Solomon running 45.98 should be equal to about a 1:44-flat for him.
My fear with Solomon is that, because of his lack of endurance, a race that goes out in 52-53 is going to wear him out as much as one that goes out in 50-51. It's in his best interest that the race is over as quickly as possible, because there are probably only 3 or 4 other guys that can run an 800 as fast. If they come through 600m in 1:19 (on schedule for around 1:46), that opens the door for the distance guys to be fresh enough to outkick the speedsters.
I like Symmonds, Andrews, and KD to make the squad. Unfortunately I think Solomon is better suited to the Diamond League than USAs and the Olympics.