Caregivers Marketplace! Here is a link to the 2009 form. Note that only Jumbo size Huggies Snug & Dry, Little Movers, and Little Snugglers (formerly - Gentle Care) count. Since diaper counts in packs have been dropping through the year, the diaper counts may not add up perfectly for you.
All you need to do is fill out the form and submit with original receipts with product circled. Rebates must be postmarked by 1/31/10. Note that the 31st is a SUNDAY, so get this done this week!
It appears that Huggies is not participating for 2010. Keep checking to see if other diapers begin to participate. The savings really adds up - $.75 per pack of diapers!