While the PSP's loading of UMD may be unmercifully slow, Sandisk is trying to improve Memory Stick Duo transfer with its Rapid GX Memory Stick Pro Duo. The Rapid GX includes Sandisk's MicroMate high-speed card reader, which—surprise!—increases transfer speeds to and from the PSP by as many as three times. That's almost five times as fast! Look for the Rapid GX sometime in July.
While you're at it, be sure to look for the increased storage capacity Memory Stick Duos that Sandisk is also launching. A 4GB Duo will set you back about $200. Still no word on the Rapid GX's price, however.