If it makes you feel any better after plenty of initial indications that BOTH waves would be in the States by 4/18, I just received notification that wave 5 (wave 6 was released first here, and I found a few of its figs in my local Wal-Mart Friday) has finally arrived in the States as of yesterday.
And there I thought Hasbrotoyshop was teasing me with the case arrival dates of 5/23. Don't buy from them, but I guess I shouldn't doubt them either!