I'll admit I'm more of a CVS guy than Subversion but it appears the anon SVN may have an issue at the moment. I have followed all the steps in the docs 2.2-2.3 using 3 different subversion tools including tortoise 1.4.2 and get various errors below:
 
Trying to checkout to a new folder using http://anonsvn.labs.jboss.com/labs/jbossrules/trunk as the repo:
Error: REPORT request failed on '/!svn/vcc/default' 
Error: REPORT of '/!svn/vcc/default': 400 Bad Request (http://anonsvn.labs.jboss.com
 
Trying to checkout to a new folder using http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-repository as the repo:
Error: REPORT request failed on '/!svn/vcc/default' 
Error: REPORT of '/!svn/vcc/default': 400 Bad Request (http://anonsvn.labs.jboss.com
Trying to browse the repo using Tortoise:
Error * REPORT request failed on 'http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-repository' REPORT of  'http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-repository': 400  Bad Request (http://anonsvn.labs.jboss.com)
 
When I use https://svn.labs.jboss.com/labs/jbossrules/trunk/ to try and checkout I get the username/password which I guess is fine, but I dont have an account, tried anonymous as user with various other things.
 
Could use some advice as to how to checkout some code, or confirmation something is broke at jboss.
 
Thanks,
Michael Rhoden