I have seen a lot of posts asking about pallet wood in here and my brother gave me an excellent tip today for removing the cross members.
To take out the nails drill a hole directly into the the center of the nail head. Use a bit roughly the size you think the nail is. I just used a 2/16 bit but it will depend size on the nails in your pallet of course. This causes the head to pop off. The ones that dont are easy to remove with an old set of tile nippers. Works like a hot damn, as my dad would say. I just turned the pallet on its side and gently tapped off the cross members. To remove the remaining nail from the beams I just used a cats paw with a scrap block underneath. Had an 8' long pallet disassembled in about 45 minutes and all the wood is very useable. Poplar and oak. I am very pleased to say the least :) Hope this tip helps out some of you.
John V