Through Sunday, Newegg is offering $10 off any preorder priced at $39.99 or more. Use the code EMCNBNG58 at checkout to get the discount. You can use the code as many times as you want, but each order must be done separately. I preordered Paper Mario : Sticker Star, Zero Escape : Virtue's Last Reward, and Harvest Moon : A New Beginning for $29.99 each
Newegg doesn't charge you until the item ships and everything I've preordered from them has arrived the day after their release dates.