As iPad release date approaches, Apple is ready with all guided tours to increase knowledge about various features on iPad. There are loads of videos divided into the following categories :
1. Youtube
2. Mail
3. Photos
4. Safari
5. iPod
6. iTunes
7. iBooks
8. Keynotes
9. Numbers
10. Videos
11. Pages

So, if you are buying iPad or Preordered, head over to the Guided Tours to know all about the device.