I saw SCPlugin when I first discovered versioning, but it wasn’t compatible with the newer versions of Subversion as I recall. It hasn’t been updated in a long time, but I noticed a new version out on MacUpdate and had to check it out. When I was in CS2335, I used TortoiseSVN under Windows for all my C# coding and loved it. At last there’s something that has one of the two big things I really enjoyed from TortoiseSVN (GUI interface in the Finder). It still needs something like TortoiseMerge for dealing with conflicts, but still, this is a huge improvement over the command line or Quicksilver for me. There are icon overlays to indicate versioning status, that seems to be a bit buggy though, because as soon as I removed the .svn directory in the root of my homedir (since my entire homedir is, sadly, not versioned), it stopped working in a number of my working copies. Regardless, this is an amazing tool for anyone who uses Subversion on OS X and I look forward to further updates of SCPlugin.