5THIRTYONE: Controlling multiple Macs, locally and remotely

http://5thirtyone.com/archives/825
"For anyone who owns more than one Apple computer, the thought of controlling two or more machines at the same time is surely something many people think of. Despite any previous assumptions you may have had, the steps necessary to control two or more Apple computers [at the same time] is quite simple and easily completed by anyone willing and able to follow a few simple directions. The challenge now is not a question of "How could I possibly setup and control multiple machines - for free?" Rather, the challenge is deciding whether or not you need 1) simple "local" control (main desktop + a secondary computer on the same desk), 2) remote access (control your desktop from the cafe or office), or 3) both. We’ll look at setting-up both local and remote access using two methods - both utilizing free - and secure (if applicable) - software."