VTK 6.1 introduces a new framework to facilitate the development of shared memory parallel algorithms. The initial guide for this framework can be found here. Note that this is only the beginning of this development and it simply introduces a few foundational classes and some example filters. Our next objective is to start parallelizing core functionality in VTK. If you are interested in further developing the SMP framework, developing new parallel algorithms or parallelizing existing ones, please get in touch on the VTK users or developers mailing list.