I'm cheating a bit and storing multiple projects under one root repository. The instructions on the "Source" tab are hard-coded and incorrect for this case. Use these below for anonymous read-only access:

# trunk
svn checkout http://reference.googlecode.com/svn/eclipse-blank/trunk eclipse-blank
svn checkout http://reference.googlecode.com/svn/springapp-enhanced/trunk springapp-enhanced

# branch/tag
svn checkout http://reference.googlecode.com/svn/springapp-enhanced/branches/springapp-sitemesh springapp-sitemesh