This deal has ended.
Buy.com has the 4gb Sandisk Cruzer Micro Titanium USB Drive for $45.55, no rebates required (most good memory and drive deals involve rebates). Shipping is free and there is no sales tax (except CA, MA, MD, TN). New Google Checkout users can get a $10 off discount for signing up, dropping the price to $35.55. This has a retractable USB port, is very fast and has a liquidmetal casing that is crush-resistant to 2000lbs.