Squeak,
this is just a guess, but some of the guitar centers decided to discontinue the PSR9000 keyboard a month ago as well. Musicians Friend is owned by Guitar Center and this might be the reason. When I was at NAMM, some of the Roland people thought that in the LA market I might be the only dealer stocking and selling the VA76. The reason is obvious because of my involment in selling arranger keyboards, but there is still the feeling from the company that these high end arrangers are a hard sale to most stores. The EM55 is not considered high end, but if Musicians Friend has not been able to sell other arrangers, perhaps they didn't want this one.
George Kaye
Kaye's Music Scene