Costco has Sandisk Cruzer Micro 4GB USB2.0 Flash Drive for $36 with free shipping and no rebates. Cheapest on PriceGrabber is $60.
http://www.costco.com/Browse/Product.aspx?Prodid=11123986&whse=BC&topnav=&browse=&s=1
http://www.costco.com/Browse/Product.aspx?Prodid=11123986&whse=BC&topnav=&browse=&s=1