The Semantic Tools for Web Services update runs on WebSphere Integration Developer (WID) and has a number of new features. I am particularly happy with the BPEL generation support (which I had a hand in coding), because of the rich Business Process support in the WID environment. It is now possible to run a semantic match against your WSDL interfaces, generate a BPEL from the composition results, and edit the BPEL in WID's Business Process Editor.
You can test out the Business Process within the WID environment and when it's ready, you can then export your new web application to deploy to a production application server. With this update, one can develop a fully end-to-end semantic web services scenario.
There are online demos available to let you preview the new update.