Apple iPod-bad corners

 From:  crydee

at the moment i try to model an iPod.

seems so far good but i have problems with the backpart. if yo look at the nex picture you can see some edges and no smooth corners.

for the backpart i used loft. is there a better way to produce this kind of surfaces? i have no idea to fix this problem. would be nice if somebdy can give me an advice.

thanks in advance.