- avatar interoperability: take (some) properties of your avatar (e.g. assets, name, identity certificates and more) from one virtual world to another
- integration with existing business processes: existing business applications and data repositories should be able to interact with virtual worlds
- secure transactions - in and across worlds
- open standards for interoperability with the current world wide web
But in the mean time, read the whole thing!
Update: read the official IBM Announcement as well.