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 ,
Trac is a wiki and issue tracking tool, which happens to include an SVN browser. The RevtreePlugin, for Trac will allow you to display your repo in a graphical form. Trac is still a very young application(latest version is 0.11.1), but we use it at work for our software development and it's proved very useful so far.