Not that I know of.

Even that static="true" is currently unsupported.

 <xsd:complexType name="beanType">
 ...
 </xsd:sequence>
 <xsd:attribute name="name" type="xsd:string" use="optional"/>
 <xsd:attribute name="class" type="xsd:token" use="optional"/>
 <xsd:attribute name="mode" type="controllerModeType" use="optional"/>
 </xsd:complexType>

public class JarUtils
{
 /** The jar suffixes */
 private Set<String> jarSuffixes = new CopyOnWriteArraySet<String>();

 private static JarUtils instance = new JarUtils();

 public static JarUtils getInstance()
 {
 return instance;
 }

 /**
 * Sets the jar suffixes
 *
 * @param suffix the suffix
 * @return true when added
 * @throws IllegalArgumentException for a null suffix
 */
 public void setJarSuffixes(Set<String> suffixes)
 {
 if (suffixes == null)
 throw new IllegalArgumentException("Null suffix");
 jarSuffixes = suffixes;
 }

 /**
 * Add a jar suffix
 *
 * @param suffix the suffix
 * @return true when added
 * @throws IllegalArgumentException for a null suffix
 */
 public static boolean addJarSuffix(String suffix)
 {
 if (suffix == null)
 throw new IllegalArgumentException("Null suffix");
 return instance.jarSuffixes.add(suffix);
 }

 /**
 * Remove a jar suffix
 *
 * @param suffix the suffix
 * @return true when removed
 * @throws IllegalArgumentException for a null suffix
 */
 public static boolean removeJarSuffix(String suffix)
 {
 if (suffix == null)
 throw new IllegalArgumentException("Null suffix");
 return instance.jarSuffixes.remove(suffix);
 }

 ...

 <bean name="jarUtils" class="org.jboss.virtual.plugins.context.jar.JarUtils">
 <constructor factoryClass="org.jboss.virtual.plugins.context.jar.JarUtils" factoryMethod="getInstance" />
 <property name="jarSuffixes">
 <set elementClass="java.lang.String">
 <value>.zip</value>
 <value>.ear</value>
 <value>.jar</value>
 <value>.rar</value>
 <value>.war</value>
 <value>.sar</value>
 <value>.har</value>
 <value>.aop</value>
 <value>.deployer</value>
 </set>
 </property>
 </bean>

"Do we have a notion of being able to configure class properties rather than instance properties?"

No, because I don't want the JBossMC metadata turning into
scripting language. :-)