Sandisk unveils 4 GB memory stick for PSP

Sandisk is now producing 4 GB memory sticks for the PSP which will allow owners to store up to 20 hours of video.  The PSP is an excellent media player and now owners will be able to store reams of content to take on the road.  The new Memory Stick PRO Duo was unveiled at E3 and is expected to retail for $220.

(via UPI)