I'm going to guess taht this has already been suggested, but I searched via Google and couldn't find anything, so here we go. It's basically a one block door that would go up and down instead of side to side, it would be opened by right clicking only. You can't open it while you're standing on it, you must be on a different block (this is to prevent n00bs from accidentally opening a door and dropping there fannies into lava or fire). They would be built like shown...(Wooden Planks = Wooden SLAB)
[]
When opened, unlike regular doors, trap doors would allow any liquids such as lava and water to flow through.
When opened, unlike regular doors, trap doors would allow any liquids such as lava and water to flow through.
I found something.
http://www.minecraftforum.net.external.v.vkachalka.ru/viewtopic.php?f=1&t=188578
It's at the bottom.
Awww...I had a feeling it had already been taken...oh well.