This might not work for the OP, but for those of you living within 15 miles of your work, try cycling to work. I cycle 8 miles each way to my work and I have gotten in shape just by commuting to and from work.

This worked great at Rutgers. I gave all my roommates Linux LiveCDs, then the network detected that they had Linux and whitelisted them. They then rebooted back into Windows and were all set.

yum-updatesd in CentOS & Fedora and /etc/apt/apt.conf.d/50unattended-upgrades in Ubuntu are your friends. If you configure these properly in combination with a local mirror, you can get it to deploy automatic updates seamlessly.