I managed to compile an intel-only binary of SCPlugin, get it here:
http://web.inf.tu-dresden.de/~s2642662/macstuff/SCFinderPlugin.plugin.zip and copy it to ~/Library/Contextual Menu Items (create, if the folder doesn't exist). Now you can use the context menu for subversion operations. As Egil has stated in his short introduction it is not possible to access svn repositories which require authentification (which to my knowledge the mosts do).
To work around this, make a checkout via terminal (e.g. "svn co
http://myrepo.url"). After the first checkout SCPlugin should work.
SCPlugin was statically linked against subversion 1.2.3, thus it should work without svn being installed (on my system I installed it through fink)
Have fun...
Christian
PS:Refrain from bugging me with support questions, I simply compiled the code by replacing the mach_override code with the given links...
