For those that missed the Fry's Roomba deal, you can get almost the same deal in store at Bed Bath & Beyond right now with the sale they just emailed this morning. It's YMMV because you may get a knowledgeable cashier who won't allow the coupon due to the stated Roomba 900 series exclusion, but the in-store computer doesn't exclude it.
was $899 on sale for $799 less $160 w/ BBB 20% off coupon = $640 + tax
was $699 on sale for $599 less $120 w/ BBSb 20% off coupon = $480 + tax
There were no sale signs in my store (State & Grand, Chicago), but they rang up with the sale price and the cashier had no issue with the coupon.
Edit: As an added but small bonus for Amex cardholders, add the $5 offer for BBB statement credit before buying.