The free kraft groceries deal starts today and you can do it anytime through August 23rd. You must purchase your $25 of participating products at one of the participating stores. The local store to do this at is Albertsons, but if you aren't local you can do it at: ACME, Biggs, Cub, Farm Fresh, Hornbachers, Jewel-Osco, Shaw's, Shop N' Save, and Shoppers.
Details: You'll have to spend $25 so any coupons you use will make this a moneymaker deal. Even without coupons, this is a really cool freebie! After you purchase your $25 in groceries, a catalina coupon will print for $5 off your next purchase at that store- you'll have 2 weeks to use it (for those unfamiliar with catalinas). You'll also get a form for a $20 rebate to mail in. There is a limit of one per household.
You'll find a handy printable shopping list here. Now you just have to keep your eyes peeled for coupons. I'll try to get a list of matching printable coupons soon (maybe naptime today?).