The August 2010 coupon book is out and you can download and view it right here on Costco Insider. Coupons are valid August 19th to September 12th. You do not need to bring it to the store to get the discounts, just mention it to the cashier.
Costco coupon book 8/19 to 9/12 (August 2010)
August 12th, 2010 
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Thanks for posting this, please can you also upload the backside of the coupons
Sorry, I did not scan the backside of the coupons. You should not need them though, if you go into any Costco they will have coupon books either at Membership or at the Supervisor kiosk. And most Costco’s will now just keep a copy of the coupon books at the register and scan it there, so you don’t even need your own book.