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Looks like services seem to be working with a current (11/23) git checkout, I just ran the AddTwoInts test with a python service and a java client (code below). I followed the setup howto here.

import org.apache.commons.logging.Log;
import org.ros.exception.RemoteException;
import org.ros.node.Node;
import org.ros.node.NodeMain;
import org.ros.node.service.ServiceClient;
import org.ros.node.service.ServiceResponseListener;
import org.ros.service.test_ros.AddTwoInts;

import com.google.common.base.Preconditions;

public class TestService implements NodeMain {

private Node node;
private static final String SERVICE_NAME = "/add_two_ints";
private static final String SERVICE_TYPE = "test_ros/AddTwoInts";

@Override
public void main(Node node) {
    Preconditions.checkState(this.node == null);
    this.node = node;
    try {
        final Log log = node.getLog();

        ServiceClient<AddTwoInts.Request, AddTwoInts.Response> client =
            node.newServiceClient(SERVICE_NAME, SERVICE_TYPE);

        // TODO(damonkohler): This is a hack that we should remove once it's
        // possible to block on a connection being established.
        Thread.sleep(100);

        AddTwoInts.Request request = new AddTwoInts.Request();
        request.a = 2;
        request.b = 2;

        client.call(request, new ServiceResponseListener<AddTwoInts.Response>() {
            @Override
            public void onSuccess(AddTwoInts.Response message) {
                log.info("I added 2 + 2: " + message.sum);
            }

            @Override
            public void onFailure(RemoteException arg0) {
                log.info("I failed to add 2 + 2");
            }
        });

    } catch (Exception e) {
        if (node != null) {
            node.getLog().fatal(e);
        } else {
            e.printStackTrace();
        }
    }
}

@Override
public void shutdown() {
    node.shutdown();
    node = null;
}
}

Looks like services seem to be working with a current (11/23) git checkout, I just ran the AddTwoInts test with a python service and a java client (code below). I followed the setup howto here.

import org.apache.commons.logging.Log;
import org.ros.exception.RemoteException;
import org.ros.node.Node;
import org.ros.node.NodeMain;
import org.ros.node.service.ServiceClient;
import org.ros.node.service.ServiceResponseListener;
import org.ros.service.test_ros.AddTwoInts;

import com.google.common.base.Preconditions;

public class TestService implements NodeMain {

private Node node;
private static final String SERVICE_NAME = "/add_two_ints";
private static final String SERVICE_TYPE = "test_ros/AddTwoInts";

@Override
public void main(Node node) {
    Preconditions.checkState(this.node == null);
    this.node = node;
    try {
        final Log log = node.getLog();

        ServiceClient<AddTwoInts.Request, AddTwoInts.Response> client =
            node.newServiceClient(SERVICE_NAME, SERVICE_TYPE);

        // TODO(damonkohler): This is a hack that we should remove once it's
        // possible to block on a connection being established.
        Thread.sleep(100);

        AddTwoInts.Request request = new AddTwoInts.Request();
        request.a = 2;
        request.b = 2;

        client.call(request, new ServiceResponseListener<AddTwoInts.Response>() {
            @Override
            public void onSuccess(AddTwoInts.Response message) {
                log.info("I added 2 + 2: " + message.sum);
            }

            @Override
            public void onFailure(RemoteException arg0) {
                log.info("I failed to add 2 + 2");
            }
        });

    } catch (Exception e) {
        if (node != null) {
            node.getLog().fatal(e);
        } else {
            e.printStackTrace();
        }
    }
}

@Override
public void shutdown() {
    node.shutdown();
    node = null;
}
}