Will any of these Flashcards work on an MPC1000

sorry if this is obvious, but i dont wanna buy some memory and have it not work.

http://www.amazon.com/Lexar-Platinum-Co ... 937&sr=8-1
^1GB

http://www.amazon.com/gp/product/B000GC ... B0009AFFCY
^2GB

http://www.amazon.com/SanDisk-Memory-SD ... 271&sr=8-1
^2GB
http://www.amazon.com/Corsair-Flash-mem ... 212&sr=8-6
^1GB

so will all of this work for an MPC1000, also why are the 2gb flash drives almost the same price as the 1gb

look in the 1k sec on the forum, there is a sticky thread about Ram and CF's