If you haven't noticed, minecraft 1.2 is here. This is the change log for it:
New jungle biome
Added ocelots
Added cats
Added iron golems
New AI for mobs
Tame wolves can have puppies
Villagers will have children if there is room in their village
New map height limit ( 256 instead of 128 )
New items and blocks
Doors have been updated so that double-doors work better with redstone
Added rare drops for mobs
Many other minor tweaks and fixes
Looks pretty good, glad they've added everything in the changelog. Now how will this affect IC? Looks like a pretty clean update, aside from the new world format, which shouldn't affect us too bad. I'm defiantly looking forward to building massive structures up so high and flying around in a jetpack at extreme altitudes.