I agree, It should be upgraded to 10GB.
I saw it on a website the 4gb one for only $99.99 crazy right.
I can only imagine prices going down even more, Sony accounced a new lower MSRP, and with Sandisk releasing the 8gb pro duo last month (though priced at a whopping $999), prices can only go down.
did anyone test the 8GB stick with his psp yet?
would be interested to know if there is a way to make it work? maybe fake formating it with fat?