This client has only minor modifications from the 6.23 client (it is near-identical to the 6.24 client currently released for Linux and OS/X). We are anticipating a major set of changes to the SMP client over the next several months, but we aren't quite there yet. Keep your eyes out for updates. (There are some big improvements to the SMP cores underway, and they will necessitate some new client code.) As stated in the thread title, the 6.24R3 client will expire July 4, 2010. Assuming our new SMP cores are on schedule, you may wish to upgrade earlier, however, as we hope to phase out the SMP A1 core as we switch to the new future cores. But we'll release more details when the new software is released (date TBD--development is still ongoing). Thanks for contributing to the project!