The machine hardware emulated by VirtualBox, as of 11/29/07 is too old to accommodate the kernel included in Ubuntu Gutsy server. Because of this it is recommended to use Dapper Drake, or Debian for your virtual server environment. Cheers to your server project 
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In an effort to provide better download speeds, I have uploaded a JeOS Gutsy VirtualBox VDI image to my hosted domain that has much better bandwidth than my home servers. The hosted domain will provide upwards of 1Mb/s which is about 20 times faster than the regular downloads. I will continue to host all the original downloads, although they will remain limited in bandwidth. The new high speed VDI downloads will be available on VirtLinux on the High Speed page. VirtLinux will be down until later today. Today is 11/22/2007 3:39PM EST.
http://www.virtlinux.com
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At medibuntu they offer a repository with two important codecs required to play most media and DVD files. The W32Codes is for 32 bit Linux systems, and the W64Codecs is for 64 bit systems. Libdvdcss2 is for DVD playback. Simply add the proper repository to your /etc/apt/sources.list file, also add the gpg key, hit a quick sudo apt-get update, and your ready to install your much sought after media codecs.
For Feisty run the following in a command window:
sudo wget http://www.medibuntu.org/sources.list.d/feisty.list -O /etc/apt/sources.list.d/medibuntu.list
For Gutsy Gibbon run in a command window:
sudo wget http://www.medibuntu.org/sources.list.d/gutsy.list -O /etc/apt/sources.list.d/medibuntu.list
Then add the gpg key with the following command:
wget -q http://packages.medibuntu.org/medibuntu-key.gpg -O- | sudo apt-key add - && sudo apt-get update
Note that this command will also update your apt system, then all you have to do is install the codecs:
sudo apt-get install w32codecs libdvdcss2
or:
sudo apt-get install w64codecs libdvdcss2
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Its clear that Linux has come a long way, and the Ubuntu distribution is a prime example of the incredible progress. While the system is for all practical purposes completely functional, and bugs are quite negligible, it does not have the consistent opeartion achieved with a clean Windows installation. I currently use Ubuntu, and very rarely Windows, and overall I look forward to the future of Linux as it is inevitable that software will be updated, and all Linux distributions will mature greatly.
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Ubuntu Gutsy does not use the same package name that was used in Feisty. In Feisty the NVIDIA driver was installed with:
sudo apt-get install nvidia-glx
In Gutsy the driver is installed with:
sudo apt-get install nvidia-glx-new
You can also use the restricted driver manager, which most likely recognizes your NVIDIA hardware
New Post About Nvidia-Glx-New
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The network manager applet, in Ubuntu Gutsy, provides a save feature that will automatically unlock your wireless keyring without the need for a manually typed password. This is a much welcomed feature, whereas in the past to unlock the wireless keyring required manual input.
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I highly recommend installing the Feisty VirtualBox package even if your are using the new Ubuntu Gutsy. First off, by default the USB host bridge is disabled in the Gusty compilation, and when you enable it manually the sound bridge fails to work properly.
I have successfully install the Feisty compilation of VirtualBox on my Gutsy desktop without any problems. This successfully resolved the USB and sound issues. Everything simply works fine.
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