L.D.
I too, am cheating on the baby weight by wearing a body shaper (I'm wearing it right now and loving it!) Its a flexee (?) I think, from Stein Mart and cost $30. Its doing a good job on my tummy and muffin top (hate that term :( ) area.
Its good because these rolls and lumps dont show under shirts so my knit shirts and sweaters look better. I would say it makes me look about 5 pounds smaller.
It has an underwire bra and some clasps in the back so it is adjustable and comes in different cup sizes, so I think it does a decent job of not squashing me on top. Its not perfect, but for $30 and something that is supposed to be "temporary" its a good solution.
However, I am normally a size 4 but with baby weight am in a size 6 or 8. I think this is a good solution for someone my size or a little larger, but cant say how it would work for someone looking to hide 15 or 20 pounds.