As you can see, the latest 6.0.4 version of VMware Workstation now works perfectly in Ubuntu Hardy Heron without any kernel patching. Also you may notice I'm running Mac OSX Tiger in VMware! I downloaded an already setup VMware image, but there is a how-to here.
Update: It works not quite perfectly, at the moment it needs configuring everytime I reboot, which is annoying!
Update 2: Sorted! it seems an ubuntu kernel update has fixed this issue, its work fine now.