Im probably not the first to think of this but yeah..... have pyramids spawn in deserts with the new sandstone, with the interior being a generated maze with traps, mobs (idk bout u peeps but a mummy would be beast XD) and chests full of loot....woops apperently i posted this idea twice. owell XD
A mummy mob would be awesome. Although, i dont know about traps since anything redstone wouldnt generate properly half of the time. But a mummy spawner in a tomb underneath or in the pyramide would be very cool, and instead of cobblestone/mossycobblestone around the dungeon, itd be sandstone and hieroglyphic sandstone.
http://www.youtube.com/user/FriskyShotgun?feature=mhee
http://Youtube.com/HarriPlays