Ubuntu 8.10 for the desktop will include improved wireless support as well as a new "guest" feature that will enable users to allow others to use their machines to check e-mail or browse the Web without disturbing personal settings. Users will also be able to store Ubuntu 8.10 on a USB drive and carry it with them.
As for the server version, Canonical's COO, Jane Silber says:
Ubuntu 8.10 Server Edition is a terrific milestone that underlines the value in our twin track release strategy. [It] embraces cloud computing, virtualization, mail server enhancements, Java development and deployment, as well as a range of services to help system administrators and developers.
The server version includes Virtual Machine Builder and a complete Java stack, among other things.