Buy 1 Roomba, Get 1 Free!
Well... almost :). Right now, if you buy any Roomba robotic vacuum cleaner over $279 at time of purchase, you can get a FREE Roomba Dirt Dog cleaner too! Here's a link to the rebate form.
Tip: If you're going to buy a Roomba, first use their referral program to get a 10% off coupon code, then plop down the coupon code perform50 to get another $50 off your order!