Sun's free virtualization productVirtualBox released version 1.6, which supposed will fix the PAE Guest issue which prevented Ubuntu from installing last time.
The good news: The download of VirtualBox is simple and the UI is a lot better than the beta version I looked at a few weeks ago.
The bad news: There is a big warning saying "if you have a 64-bit host OS, then you need to run a 64-bit guest OS" (and the same for 32-bit). Ok, so I attempted to install Ubuntu Hardy Server 64-bit (e.g. the 'amd' version) since Leopard/10.5 is a 64-bit OS. The VM complained that it needed "x86_64" but only found "i686". Sigh. Ok, let's install Hardy Server 32-bit. It installs, but does not boot, and gives a complaint about the CPU and "0.6" (i.e. a random error message).
Ok so much for that. Looks like we'll wait for version 1.7
