[meapix]

> requires no special hardware or kernel modules

http://xtreemfs.org/quickstart.php

If not already loaded, load the FUSE kernel module:

> modprobe fuse

[pmalynin]

Except that FUSE is pretty mainstream.

[meapix]

It was officially merged into the mainstream Linux kernel tree in kernel version 2.6.14. Anything before that is a special kernel module.