this is cribbed from esato
http://www.esato.com/board/viewtopic.php?topic=37337&forum=35
Dear Customer,
Thank you for your patience in waiting for the availability of this product.
Unfortunately we have just received word from Sony that they are discontinuing this item. Since it first came out, this item has had a large back order, but only a very limited few were made. Sparco�s backorder was never filled.
The Magic Gate Series of the Memory Stick are the only ones that are to be discontinued. We do carry the regular memory Sticks by Sony (i.e. Sparco Part #: A666698). Though, the Magic Gate Series is discontinued, the Magic Gate�s 64MB Memory Stick made it through production. The Sparco Part Number is A159532. There are plenty of the 64MB Magic Gate available at the moment. These are the 2 options that we can suggest.
Please let us know how you would like to proceed from here. Thanks
Dillon Ong
Unistar-Sparco Computers, Inc.
Customer Care - Sparco.com