This deal has ended.
Through 6/24, Buy.com has the Logitech EX110 Cordless Desktop for only $19.99 after a $5 mail-in rebate. Plus, shipping is free and there is no sales tax (except CA, MA, MD, TN). Also, new customers can use this $5 off $50 coupon or new Google Checkout users can sign up and get a $10 off discount (you can't get both). The Google Checkout discount will reduce the price to $9.99 despite it being $40 or more at other stores.