HTC One M9 U.S. pre-orders to begin shipping on March 30

"Orders for the HTC One M9 will begin shipping on Monday 3/30, and should ship by Friday 4/3 at the latest. Any changes to this will be communicated directly to you from HTC."-Email from HTC to customers who pre-ordered the HTC One M9 in the U.S.
If you've been waiting to hear about the rumored HTC One M9+ before making up your mind about which model to reserve, HTC will be holding an event on April 8th at which time a number of new phones could be unveiled. We just might see the HTC One E9 and the HTC One E9+ unwrapped. And if all the planets are aligned properly, we could see the HTC One M9+ finally become official. It still is extremely unclear if the U.S. market will receive any of the models that HTC will be introducing on April 8th.
source: AndroidCentral