This is one of the things that's always driven me nuts on Linux, and also one of the things I really like. Some projects that are interesting like this seem to

This is one of the things that's always driven me nuts on Linux, and also one of the things I really like. Some projects that are interesting like this seem to disappear for a while, but often the concept will be resurrected under a new project. CoLinux is one of them, UserFS (now FUSE) is another one that went away for a couple kernel versions and is now back. I'm still waiting for an SSI (single system image) to make a comeback though (Mosix, OpenMosix, OpenSSI, but none of them work with newer kernel versions).