[This seed is for Minecraft 1.0]
This interesting seed was discovered by Barlettinha on the Minecraft forums. North of the spawn point at (x=750, z=420) is a large mushroom biome island. South of spawn at (x=540, z=300) is an End Portal which can be seen through the water and reached by swimming down to the ocean floor.
Minecraft Seed: 77924588a