Check the home page for the latest seeds. I try to update this list every time I post a new seed, but remembering it is so difficult. :P Newest seeds are at the top of the list.
Version 1.3 seeds
4 biomes at spawn + cocoa beans
Spawn in village with 5 diamonds (for Minecraft 1.3)
Desert Temple at Spawn
Version 1.2 seeds
HUGE cave w/ lots of ores (plus jungle and plains)
Jungle Island
Before 1.2
Village seed for 1.1
Wacky islands
Maps
Some downloadable maps are featured on Seed Hunter as well.
Dungeon Runner
---
Beta seeds (before 1.0)
A perfect village
Wild 'n' steep mountains + something interesting
Intersection of 3 biomes
Massive snow world
Survival Island
Pink sheep!
Spawn in a village!
Before beta 1.8 (these are for Minecraft beta 1.7 and earlier)
schönster
-1784338777788894343
Dead Mau5