As long as we're going to hit the inode format, and creating a new
magic number, some things I'd like fixed from the wish list:

1) Eliminate the remaining file size limits. As it stands, you can't
actually have an FFS file of 2^63rd size, although the system calls
are all fine.
2) Expand time in inodes to 64 bits of seconds. Sure, we have 39 years 
to do it but I see no reason not to do it now given the relative
expense of writing an inode to disk vs. the expense of the extra
couple of operations.
3) Eliminate endianness of FFSes -- this is more controversial. Right
now, we have bi-endian support, but it would be cool not to need it.
4) GC old goo like the old uid/gid support.

Perry