The Commodore 64, many geek's first love, is turning 25. You can relive the glory, and still find a lot of the old software. Even more surprising is how much is still being done with it. Someone ported vi to it (obviously not EMACS). Somone else wrote a browser. For the ultimate, a souped up motherboard merges the C64 with contemporary peripherals.
Holy Cow! The disk-based magazine LoadStar is still being published! If you haven't heard of this venerable magazine before, you'll know its platform -- the Commodore 64. The magazine publishes monthly software collections and still delivers via disk though now also delivers via email and makes several nods to the fact that y'all might not actually own the hardware any longer. Loadstar is also notable for it's early promotion of Quantum Link, the predecessor to a service you might be somewhat familiar with.