hehe! Well we're going live (Friday?) with X1.5, which has quite a few bugfixes, splits TBO and GT2/R, inclusion of the FBM and a new UF-BR class. It also has some spam filter changes and other minor updates. It's essentially an extended version of the X-System.
X2 is now planned for some time closer to the end of Q1/08, but we'll have X1.6 and X1.8 before then too, with significant enhancements.