A new version of Rgraphviz has been committed and binaries on all platforms are available. Latest version is 2.1.2. The major change in this version is that Graphviz is now bundled with Rgraphviz. Rgraphviz no longer depends on any external programs, and is now as easy to install as any other package. This includes 64 bit Windows. Testing on various platforms would be highly appreciated. Please tell us if you have problems building from source or using the binaries. A more detailed announcement will follow when we believe the current code has been thoroughly tested, and a few remaining issues has been addressed. Best, Kasper Daniel Hansen