This inspiration board is up on BHG today (so go here for links to all the items) - a little inspiration for a twin room.  This has a neutral feel (for those of you brave enough to wait to find out with twins!!) that you can easily tweak to go more girly or more masculine if needed.  Or it would work well for a girl and a boy duo.  Those darling sparrow cribs are a bit pricey, so if you like the look, you could go with the Hudson crib for a modern lookalike, or a Jenny Lind for a classic touch without the hefty pricetag.  If you prefer color on the walls, a very light fresh blue would be nice (like Sherwin Williams Embellished Blue).