Apple has sent out special invitations to a press event to be held on 2 march. Apparently, it's the launch date for the new 2nd generation iPad.
I'm just speculating here, but I think it's safe to say that the iPad 2 will have the following additions, in order of likeliness
- Higher resolution screen
- Camera ( front and back )
- Facetime
- Possibly, a smaller screen
- New design changes
- Newer OS
- Thunderbolt connector