You can still paint and plan clothes without knowing the sex. How about green and yellow for a room? There are a lot of gender neutral newborn and infant clothes.
Totally. I like the surprise, but it seems like a more thrifty option. I don't want to have to buy a whole new round of infant stuff for #2 someday if they're different sexes...not like the baby cares what it's wearing! (I'm also not a fan of pink-is-for-girls/blue-is-for-boys - my taste runs more toward bright colors for outfits, and neutrals for decoration anyway).
Plus, as my mom pointed out, "You're due in July. That kid's just going to be wearing diapers and t-shirts for the first two months anyway." heehee.