Just you, some trees, and a couple friends.
Skyblock is a wonderful map, but this is NOT Skyblock, and is nothing like it. Play it for 20 minutes and you'll see.
4.0 Initial release. You can pretty much make, breed, grow, spawn, or trade for everything in the game, eventually. If you're smart
4.1 Incremental Update to Minecraft 1.5. Added Quartz and more Soul Sand. Put most starting items in a chest. Increased biome sizes and replaced the Desert with a Mushroom biome. Modified the challenges to be much easier to mark completed. Moved the spawn point so slimes are easier to get.
TO FIX SLIME SPAWNING IN A 4.0 MAP:
ADFLY LINK: OceanBlock 4.1
DIRECT LINK: OceanBlock 4.1
ADFLY LINK: OceanBlock 4.1 Hardcore
DIRECT LINK: OceanBlock 4.1 Hardcore
Version En Español (Thanks to MsFenixWolf):
ADFLY LINK: OceanBlock 4.1 En Español
MEDIAFIRE LINK: OceanBlock 4.1 En Español
The Emergency Cache
I'd welcome any suggestions. If you make something awesome I'd also love to see screen shots or videos!