You can call it too commercial but I LOVE Restoration Hardware for really any room in the house. But these designs are especially beautiful for a cool calm nursery that will never go out of style.
They also have great ideas for a nursery for two. This picture features the Millbrook iron crib. I think this look is very farmhouse chic and imagine it would suit almost any home.
As your children get older, they have great bedroom and playroom options as well.
For more ideas and product information see the Design Gallery | Restoration Hardware Baby & Child.