As I posted elsewhere, I had a co-worker who ordered today from ushopwireless to take advantage of their preorder $99 deal. The salesperson told her that she should have the handheld by Friday of next week.
I laughed at first and told her not to hold her breath. If he was basing his prediction to her on this April 3rd date, then it makes more sense. Even then, I would imagine the April 3rd release date would be for corporate users and it would still be a week or so before it would trickle down to consumer purchases.
I tend to agree with disp350. With so many dates being tossed around, I won't believe any date until I have the device in my hands.