Apparently K-Mart has changed their mind and has pulled this coupon. More info can be found at COUPONER'S UNITE blog: http://couponersunited.blogspot.com/
K-Mart has a $10 off $20 coupon that does not expire until 5/22/10. This could be combined with other coupons for some fantastic deals.
Link: K-Mart $10 of $20
There has been mention on afullcup.com of some great diaper deals. Here is one that elmommyto2 did:
2 Huggies at $9.99 ea.
1 pack of clearanced gum $.25
Use 2 $3 Huggies IPs, Link: Huggies
Total was $4.23 + tax!
A word of caution. I would highly recommend checking with customer service before you do your shopping. Others have reported that they checked with customer service and have been told that if it scans, they will accept it and it did scan. Better safe than sorry!