1. Lever On Wool Minecraft Sign, Pull To Reveal Portal.
2. 2nd Village East Of Tutorial Area
3. Waterfall Near Second Village
4. Tower In The Water North East On 2nd Village
5. Random Lava Under Sand In The Top Right Corner Of Map
6. Floating Water (Only 2 Blocks) x:360 y:65 z-41
Not Hidden But Strange Stuff..
1. Lots Of Gravel Beaches
2. Lots Of Places To Cause Those Chain Reaction Falls When You Hit Sand
3. Lots Of Pumpkins
4. If You Dig Straight Down In Tutorial Are There Is Lava
They added Sugar Cane to the tutorial world with the 1.7.3 update.
Also, OP, please check the forums next time. They may be old, but there are already about 5 or 6 topics about this stuff. Don't really need more redundant topics flooding the forum burying other threads.