http://www.ubuntu.com. Now, we can easily reboot to the 64bit partition when running Shadowfax. However, for ordinary, daily work, I think I'll leave 32bit Ubuntu running with VTI and Smart Notebook. Note the blue flashing USB stick. That's a Bluetooth reciever for my Wacom Graphire 6x8 remote mouse tablet (aka Smart Airliner Slate). Also, the device on the left is the wireless mic reciever which plugs into the audio port in the front of the PC right next to the Bluetooth dongle. Further, next to that audio input cable is the audio output cable for the SmartBoard speakers.
http://shadowfaxrant.blogspot.com/2010/10/cistheta-meeting-iv-2010-2011-rip.html. Our new servers are running 32bit Ubuntu 10.04 edition. Note the RAID drives!
http://www.edmodo.com more and more. I use this server mostly for backups now. I added openSSH and vsFTP to this server so I can upload files as root (no other ssh accounts) and my students can download files via anonymous ftp. BTW, openSSH is also on all the Student Stations since the cluster uses public-key authenticated ssh.
http://www.zazzle.com of fractals and ray tracings we generated on our Linux Super Cluster, aka Super Computer, Shadowfax.
http://www.screencast-o-matic.com with my wireless lapel mic for years now recording my classes for http://www.youtube.com/calcpage2009 from both the front and the back of the room.