Real strange.
I cannot find a tool that enables one to display a SVN repository in graphical form. I would like the ability to see changes in revision / time ,
Fisheye, from Atlassian, looks at an SVN repository and can show you a few graphs. Also provides a handy web interface for blame, diff, etc.
for example, some sample images at one of the demo servers:
And if you like some pretty code metrics, here are some samples.