Rejoice, one and all! Calvin and Hobbes, the best comic strip EVER is available online, with a “new” one every day! Of course, they’re not new, since Bill Watterson isn’t doing it anymore, but there’s a different one every day. There are lots of different comics at that site, actually, including another of my favourites, Foxtrot, and if you want, you can also get really lame ones like B.C.
Sadly, no The Far Side.