I love vintage white furniture and white wicker for girls rooms
Burlap and fabric rosettes r pretty popular right now...maybe with a pop of color in the room. Iron style cribs and custom bedding r also in. Old wooden letters that spell a certain name or word...or that r painted like distressed wood for decor.
If you know how to sew, look in the quilting section of a good fabric store for cotton curtain material and throw pillow covers. They often have good selections of vintage-style fabrics. Or google "vintage fabric prints" and buy online.
If you don't sew, my only suggestion is not to use genuine vintage furniture. My cousin put her baby into an heirloom bassinette, and he fell right through the wicker bottom.