http://www.minecraftforum.net/topic/600254-surv-skyblock/

That is some real survival game ! You spawn on a small island with starting resources :
Tree
12 String
1 Lava Bucket
2 Ice
1 Bone
1 Melon Slice
1 Pumpkin Seed
1 Red Mushroom
1 Brown Mushroom
1 Sugarcane
1 Cactus

Build your lovely house with the resources given
For more info. please visit that forum ! There are challenges and many things too.

Maybe we should have that in our "The End" what u guys say ? xP

I have a go on skyblocka couple of weeks ago, Its very fun
but I think the skyblock map I played was the harder version were you had to build a nether portal and such

How could you possibly build a nether portal without any flint and steel which requires iron?

simple use lava and wood to create a fire next to the portal

And that is exactly why I am an idiot...

ah but im an idiot too i spotted a youtube video that explain how activate a portal without flint and steel