I got a head's up on this deal recently, I went and got mine with no problems! Walmart has the Gain dish detergents for $0.97 so you can use these coupons below and get stocked up on FREE dish soap! :)
Get 2 free with this coupon:
Gain Detergent, Gain Fabric Enhancer Or Era Detergent, Any (Excludes Trial/Travel Size) (Limit of 4 Like Coupons Per Household Per Day) - 03-17-13 RP Insert, $2.00/2 EXP 4/30/2013
Get another one with this coupon!
Gain Detergent, Gain Fabric Enhancer Or Era Detergent, Any (Excludes Trial/Travel Size) (Limit of 4 Like Coupons Per Household Per Day) - 03-17-13 RP Insert, $1.00/1 EXP 4/30/2013
I was able to snag 6 free bottles, I hope you can get some, too!