If you own a Sony gadget, you now have reason to rejoice! Sony just lowered the price on a number of Memory Stick PRO and Memory Stick PRO Duo flash media cards. Starting today, the 512MB full-size Memory Stick PRO media is priced around $180, down over $40. The 256MB Memory Stick PRO card will now go for $90. Of course, that still makes it overpriced compared to other types of non-proprietary memory.