Yes. and it doesn't work there either. I get a message saying :
Error validating location: "org.tirgris.subversion.javahl.ClientException: RA Layer request failed.
svn: OPTIONS of 'http://anonsvn.jboss.org/repos/picketlink/federation/': Could not read status line: An existing connection was forcibly closed by remote host.
It seems to be a problem of Eclipse, not a repository problem. After a quick search in Google: http://stackoverflow.com/questions/85486/adding-a-svn-repository-in-eclipse.
Anyway, I downloaded the sources using the "svn checkout" command from the console and it works without a problem.