I was about to jump on this one, but - wait a minute - it costs too much.
Let's see: we spend around $5 to "buy" 800 points (unless you are fond of swizzle sticks), then transfer 1000 Mypoints into 1000 HHonors.
That bring a cost to about $6 per 1000 HH, or 0.06c per 1 HH.
But HH points are valued in the range of 0.05 - 0.08 , so we just buy it at face value!
Another example: the best Gift Cert value is $50 Macy's at 5450 points. By using Tupperware, we'd spend 7 * $5 = $35 for $50 gift cert, but the labor ?

I'll pass, unless we'd get a free shipping - that was an original December offer