Cant' believe I forgot this ... oh well.  Here's the spec:

JMS works for both service bindings and reference bindings.

Service binding options :

                    <choice minOccurs="1">
                        <element name="queue" type="string"/>
                        <element name="topic" type="string"/>
                    </choice>
                    <element name="connectionFactory" type="string" />
                    <element name="concurrentConsumers" type="int" minOccurs="0" maxOccurs="1"/>
                    <element name="maxConcurrentConsumers" type="int" minOccurs="0" maxOccurs="1"/>
                    <element name="replyTo" type="string" minOccurs="0" maxOccurs="1"/>
                    <element name="transacted" type="boolean" minOccurs="0" maxOccurs="1"/>
                    <element name="transactionManager" type="string" minOccurs="0" maxOccurs="1"/>

Reference binding options:

                    <choice minOccurs="1">
                        <element name="queue" type="string"/>
                        <element name="topic" type="string"/>
                    </choice>
                    <element name="connectionFactory" type="string" />
                    <element name="concurrentConsumers" type="int" minOccurs="0" maxOccurs="1"/>
                    <element name="maxConcurrentConsumers" type="int" minOccurs="0" maxOccurs="1"/>
                    <element name="replyTo" type="string" minOccurs="0" maxOccurs="1"/>
                    <element name="requestTimeout" type="int" minOccurs="0" maxOccurs="1"/>
                    <element name="transacted" type="boolean" minOccurs="0" maxOccurs="1"/>
                    <element name="transactionManager" type="string" minOccurs="0" maxOccurs="1"/>

Notes:

• The choice for queue/topic can be represented as a drop-down selection which defaults to queue.  Whether queue or topic is selected, a name is still required.  So this is really two fields.
• connectionFactory should default to "#ConnectionFactory"
• concurrentConsumers and maxConcurrentConsumers can default to 1

Here's an example config:

https://github.com/jboss-switchyard/quickstarts/blob/master/camel-jms-binding/src/main/resources/META-INF/switchyard.xml

Here's the schema:

https://github.com/jboss-switchyard/components/blob/master/camel/camel-core/src/main/resources/org/switchyard/component/camel/config/model/v1/camel-v1.xsd#L249

Here's the Camel JMS doc page:

http://camel.apache.org/jms.html