I've had good luck with this guide:
https://help.ubuntu.com/community/VMware/Workstation
I did have to dl the latest version of workstation from VMware, as the one indicated in the tutorial never launched under jaunty (worked fine in hardy though).
Workstation also installs VMWare Player, the free version. I let my workstation trial expire and just keep using player. the individual player causes an D3D "Not Implemented" exception when I play my fav game, but it appears the function was implemented in the player stack that ships with workstation.