Live results can be found at:
http://www.csctigersharks.org/realtime/
Note that Mellouli gave him quite a race in the 400 IM with both at 4:11 (though Phelps did swim the 200 free the same session something that will not happen at worlds). With Czeh going 4:13 a week ago while still in heavy training looks like three guys go under 4:10 next month.
No, neither Phelps nor Mellouli were trained.
Yes, there is a good chance Phelps breaks 1:53 for the 200 fly.