GNU Guile 1.9.2 has been released today. It is the third pre-release of what will eventually become the 2.0 stable series. Compared to the 1.8 series, it provides many new noteworthy features, most notably the addition of a compiler and virtual machine. We encourage you to test them and provide feedback to `firstname.lastname@example.org'.
The original announcement can be read at http://lists.gnu.org/archive/html/guile-devel/2009-08/msg00111.html .