Sandisk SDCZ2-256
256MB USB2
$50
I saw two cases of these at Costco this afternoon. Availability may be spotty even if a Costco is in your area; their stores don't all carry the same stock.
This is the cheapest price I've seen for a USB 2 pen drive. Lowest price for this at Pricegrabber.com was $55 and they (eCost) were out of stock. The Costco price is about the same as for a bare 256 MB CompactFlash card.
