Alternatives/replacements for ReiserFS

ZDNet has a blog post regarding alternatives to going-to-die ReiserFS . The review mentions several open- and close-source file systems which can be used as the OS' main filesystem.
Why am I mentioning this in the security blog? First of all, file system is a place to hold the data, and modern file system must include security functions built into the core. Our Solid File System with it's built-in encryption and compression features is perfectly suitable for embedded appliances and other custom tasks for which you could be looking for a file system. Next, if you are looking at implementing file system, or you have a task to virtualize access to files across several devices, you will find Callback File System, a component for creation of virtual file systems, indispensable for your tasks.