The seed is -1187953457 and it is full of diamonds it works for regular biomes and I played it on version 1.5. I found 16 diamonds in less than 5 minutes and have the video to prove it.
You spawn at a jungle temple with 3 diamonds in the chests the coordinates are X: 119 Y: 84 Z: 164. Careful of all the traps if your not playing creative mode. Heading out of the jungle you could head over to the nearby witch hut (in the swamp biome next to the jungle) or keep moving into the desert…its a speed run so that is where i’m heading.
There is a surface dungeon with a projectile protection I enchanted book. No diamonds though so keep moving!
Heading to the nearby forest biome you need to go to X: 563 Y: 70 Z: 500. There should be a couple of yellow flowers (look at the screen shot if you need a better visual). Dig under the flowers and you will fall into a stronghold. There is a library but its not worth the time to check out, only one chest and no enchanted books.
The ravine system is really cool, one backs into the other, its in the stronghold but if your having troubles finding it go to X: 577 Y: 27 Z: 518. Part of the stronghold is floating in between the ravine walls which is one of the best features. The remaining 13 diamonds are in here including 7 surface diamonds in one of the ravines. The coordinates for the diamonds are as follows:
Minecraft 1.3.1 is here! And with it comes an absolutely amazing seed that Slozim found. The seed is 8491340278244839580 and you must play it on the large biomes setting.
You spawn in a plains biome, next to a desert biome and right next to the spawn point is a desert temple at X: -214 Z: 91. If you drop in at the top of the pyramid and dig below the blue block, there are 4 chests with a bunch of diamonds and other stuff in them…watch your step though!
Next there is a desert village which can be found by following the river near the temple, the village coordinates are X: -336 Z: 374. There is a blacksmiths in the village with diamonds in the chest. Keep following the river and you will find another village in the plains at X: -479 Z: 523. No blacksmiths chest in this npc village though. There is a third npc village at X: 650 Z: 632 that is built on a ravine. It looks pretty awesome!
And to top it all off right next to the third village is a jungle temple at X: -655 Z: 740. Watchout for traps while exploring it!