We've completed Iteration #12.4 and added some really nice features into Report Engine. It is possible to add summary columns, group entities and add simple charts. Here are some examples of real reports (they are working)
We will add some fancy functions during next two weeks and most likely v.2.7 with Report Engine will be released in the middle of December. So far you may play with Report Engine at http://preview.targetprocess.com (admin / admin).