I really liked these, they sold them in the hospital baby shop
http://www.glamourmom.com/
I really like the idea of those. I bought one last month in anticipation of this little one. I washed it once, then put it in the diaper bag. I wore it for the first time this week and a seam has already started coming apart. I double checked and I am within the measurements for the size I bought. We'll see how there customer service is, when I find a chance to email them a pic of the problem.
Usually, I wear a tube top (the type with the built in bra) under my shirt. Shirt can come up, tube top down and no straps to mess with. The only issue I've encountered is when the adhesive on the nursing pad doesn't stick and I lose the pad.