PreCentral.net have published some screen shots from the forthcoming webOS 2.0 release. In these, we can see that the following new features are coming:
What is not clear is when this version of the operating system will become available, and whether or not it will be made available for existing webOS devices like the Pre and Pixi.
You can see the screen shots here: "webOS 2.0 Screenshots drop: Quickoffice, VPN, more - http://www.precentral.net/webos-20-screenshots-drop-quickoffice-vpn-more"
Updated 2021 : note that the above post was originally published in 2010, but is left here for archival purposes. Sadly, webOS for mobiles is no more, along with the original Palm company, so all of the above links are now dead, and have been unlinked.