Got Ubuntu working on beta 3
I had problems with the networking not working on Ubuntu...
After digging around I finally got it working...
There was an issue that gethostbyname() returned null to Ubuntu. This creates a problem in that you cannot issue sudo commands and the network config would not start...The problem is due to a bug in that when you install and set a hostname, it is not added to the etc/hosts file. You need to edit this file as root, as the sudo command will not work....
This solution is for Wired-connections only....if anyone gets wireless working please let me know..probably needs a driver...
1. Start Ubuntu in recovery mode (press escape as soon as the GRUB menu comes up), you'll be in as root
2. vi /etc/hosts
3. add a space after localhost and add the hostname you assigned your Ubuntu instance
4. save the file

wq)
5. type reboot
In Ubuntu:
go to System->Admin->Networking and enable and activate your eth0 interface in Ubuntu...
note: appears to hang after login to Ubuntu, but eventually loads fine (must be a timeout)..
note note: enabling sound for the vm will make sound work in Ubuntu also!!