4 biomes at spawn + cocoa beans

This Minecraft seed spawns you in a jungle surrounded by three different biomes: tundra (snow), desert, and "regular" biome. That's a total of four biomes! What's even better is that there's cocoa beans in the jungle, yummm!

HUGE cave w/ lots of ores (plus jungle and plains)

A good guy with the name sahjytdr shared a seed that generates a world with jungle, plains, and a HUGE cave with lots of ores (diamonds, gold, ...) right next to the spawn.

Jungle island

This delicious seed for Minecraft 1.2.3 [UPDATE: works in 1.3.2 as well!] spawns you on a small jungle island! :-) It has a huge cave and tall trees. Click read more to read more.