"Linux's ext4 filesystem, the successor to ext3, may well be the
filesystem many of us are using a few years from now. Things have
been relatively quiet on that front - at least, outside of the
relevant mailing lists - but the ext4 developers have not been
idle. Some of their work has now come to the surface with Ted
Ts'o's posting of the ext4 merge plans for 2.6.25.
"One of the changes going into ext4 is a lifting of the
longstanding 4KB block size limit..."