I would take 2 32 gig ones just in case something happens to one.
They have 8 gigabyte cards that you can buy now, although they are rather expensive.
You can buy it here Amazon
Any memory stick should do the job.
Patriot memory cards should work just fine with a PSP, as long as it's a Memory Stick Duo.
All memory cards should be designated to operate at the same speed no matter the device.
Most of the time, memory cards outlast the camera itself. Memory cards usually work for at least five years and most last much longer.
Sandisk memory cards are functionally equivalent to all other similiar memory cards, it just is branded.
Memory cards are typically small pieces of nondescript plastic, sometimes with a label for how much information it can hold. They go inside cell phones and other electronics, to hold information that the device cannot hold. Not all devices have the same type of memory card, but you should be able to tell. You can put all multimedia information on memory cards.
Memory cards are relatively unsecure unless you put a password on the material.
Sony offers a variety of memory cards such as micro memory cards for a variety of cell phones and cameras, memory cards for a variety of game consoles such as Sony playstations.
The PlayStation 2 memory cards have the non-volatile and not the volatile flash memory.
1GB memory card has more space. The capacity of the memory cards are various, such as, 16MB 32MB. There are lots of memory cards on this website: http://www.dinodirect.com/Wii-Accessories/Wii-Memory-Cards/ You can have a look.