UPDATE: For those running VMware Server 1.0.3 there is an updated version available.
As I mentioned a few posts ago (How to Install VMware Server on Ubuntu 7.04) I would be outlining how to install VMware Server on Ubuntu 7.10.
These steps are a bit different from Ubuntu 7.04, as the canonical commercial repository is not up to date with the alpha releases of Ubuntu 7.10. There is a workaround however that can help you get VMware Sever installed.
Installing VMWare Server on Ubuntu 7.10