Matt is
finding that the current release of Xdoclet can't handle the new Struts 1.1-beta features. Since we are trying to use some of those cool new features, Roller will probably be riding on Struts nightlies and XDoclet CVS builds for a while.
Matt also tracked down some mailing-list emails that indicate that both Struts 1.1 and the next release of XDoclet should be coming in the next month or so.