Through August 7th ONLY...
HP Instant Rebate = (-)$100
Attached Staples coupon = (-)$100
TOTAL SAVINGS = (-)$200
Also, you may have a "tax free weekend" in your state for back to school shopping.
Ordered my 16GB yesterday @ a Staples store: Paid $299.99 + sales tax (free shipping); scheduled to arrive @ my doorstep on Monday, 8/08/2011.
Some report that OfficeDepot and OfficeMax will honor the coupon.
Good luck, and enjoy.