Just read here:
http://sourceforge.net/svn/?group_id=119783
it says:
"Our subversion repository has been moved to the Apache Incubator
subversion repository for our incubation at Apache. As a result we have
shut down access to the SF.net hosted repository. To check out the
latest in wicket-2.0 development (requires java 5), use:
svn co https://svn.apache.org/repos/asf/incubator/wicket/trunk
To check out the latest in wicket-1.x development (requires Java 1.4), use:
svn co
https://svn.apache.org/repos/asf/incubator/wicket/branches/wicket-1.x"
This should be using "http://" URLs, as https is only available to folks
with Apache accounts - all anonymous access is over http.
Regards, Upayavira