Congratulations, Walter!
Both Amazon and Edelweiss show a May 6th publication date, so you might want to ask your publisher to move it up. It doesn't matter for most purposes, but on Amazon (for example) people are not permitted to post reviews and give you stars, etc., until the pub date, and it looks like there are many people ready to do so as soon as they can.
In the meantime, I would encourage people to drop a quick review (just give it a 10) on
Edelweiss.