Michael Marineau announced an updated version of the Linux Kernel Graphing Project, now known as the Free Code Graphing Project. The original code was written by Rusty Russell [interview] and used to generate "a graph of all the .c files in the 2.4.0 Linux kernel: each function graphically represented and named, resulting in 180MB of PostScript."
Michael has long since taken over the project, recently releasing the first new version in a few years explaining, "over the past few months I've slowly gotten the old code base updated to work cleanly on 2.6 kernels as well as being usable on kernels as old as 1.2 :-)" He goes on to note that if you desire a complete print out of the current kernel code as a poster, "it needs to be at least 6ft wide to have a chance at reading the file and function names. Also a high resolution is required; 600dpi is just barely usable." An online version of the new poster can be navigated here.