PS. Considering how a PSP is supposed to be (and looks like) a descent mp3 player you have to count on it being used that way. Most of the time actually. Think about it for a moment.
I highly doubt this .
You have the psp which is what 200$ usd when it comes out , then u have 512 meg sony card http://www.newegg.com/app/ViewProductDesc.asp?description=20-191-221&depa=7 for 89$
YOu can get a 512 meg flash player for around 65$ now or u can get an ipod mini or creative labs thingy for 250$ that are both 4 gigs or a 20 gig ipod for 300$ .
It will make for a very expensive mp3 player and if someone is planing on using a device for mp3s most of the time which is another way of saying the majority of the time , they would buy a dedicated mp3 player for that .
This is a gaming machine , it is going to be used first and formost as that .